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  <front>
    <journal-meta>
      <journal-id journal-id-type="nlm-ta">Arq Bras Cardiol</journal-id>
      <journal-id journal-id-type="publisher-id">abc</journal-id>
      <journal-title-group>
        <journal-title>Arquivos Brasileiros de Cardiologia</journal-title>
        <abbrev-journal-title abbrev-type="publisher">Arq. Bras. Cardiol.</abbrev-journal-title>
      </journal-title-group>
      <issn pub-type="ppub">0066-782X</issn>
      <issn pub-type="epub">1678-4170</issn>
      <publisher>
        <publisher-name>Sociedade Brasileira de Cardiologia - SBC</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v3">SMh9wFpMbsgv3YdvKq9jCnG</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X2015002100202</article-id>
      <article-id pub-id-type="doi">10.5935/abc.20150100</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Case Report</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Profound Sustained Hypotension Following Renal Denervation: A Dramatic Success?</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Sridhar</surname>
            <given-names>Ganiga Srinivasaiah</given-names>
          </name>
          <xref ref-type="aff" rid="aff01">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Watson</surname>
            <given-names>Timothy</given-names>
          </name>
          <xref ref-type="aff" rid="aff01">1</xref>
          <xref ref-type="aff" rid="aff02">2</xref>
          <xref ref-type="corresp" rid="c01"/>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Han</surname>
            <given-names>Chee Kok</given-names>
          </name>
          <xref ref-type="aff" rid="aff01">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Ahmad</surname>
            <given-names>Wan Azman Wan</given-names>
          </name>
          <xref ref-type="aff" rid="aff01">1</xref>
        </contrib>
      </contrib-group>
      <aff id="aff01">
        <label>1</label>
        <institution content-type="orgname">Universidade Malaya</institution>
        <institution content-type="orgdiv1">Medical Center</institution>
        <institution content-type="orgdiv2">Departamento de Cardiologia</institution>
        <addr-line>
          <named-content content-type="city">Kuala Lumpur</named-content>
        </addr-line>
        <country country="MY">Malaysia</country>
        <institution content-type="original">Departamento de Cardiologia - Universidade Malaya Medical Center - Kuala Lumpur Malaysia</institution>
        <institution content-type="normalized">University of Malaya</institution>
      </aff>
      <aff id="aff02">
        <label>2</label>
        <institution content-type="orgname">Universidade de Auckland</institution>
        <institution content-type="orgdiv1">Departamento de Medicina</institution>
        <addr-line>
          <named-content content-type="city">Auckland</named-content>
        </addr-line>
        <country country="NZ">New Zealand</country>
        <institution content-type="original">Departamento de Medicina - Universidade de Auckland - Auckland, New Zealand</institution>
      </aff>
      <author-notes>
        <corresp id="c01"><bold>Mailing Address: Timothy Watson</bold>, Department of Cardiology, University Malaya, Lembah Pantai, Postal Code 59100, Kuala Lumpur, Malaysia. Email: <email>tjw123@me.com</email></corresp>
        <fn fn-type="con">
          <p>
            <bold>Author contributions</bold>
          </p>
          <p>Acquisition of data: Sridhar GS, Han CK, Ahmad WAW; Writing of the manuscript: Sridhar GS, Watson T, Han CK, Ahmad WAW; Critical revision of the manuscript for intellectual content: Watson T.</p>
        </fn>
        <fn fn-type="conflict">
          <p>
            <bold>Potential Conflict of Interest</bold>
          </p>
          <p>No potential conflict of interest relevant to this article was reported.</p>
        </fn>
      </author-notes>
      <pub-date pub-type="epub">
        <month>08</month>
        <year>2015</year>
      </pub-date>
      <volume>105</volume>
      <issue>2</issue>
      <fpage>202</fpage>
      <lpage>204</lpage>
      <history>
        <date date-type="received">
          <day>26</day>
          <month>07</month>
          <year>2014</year>
        </date>
        <date date-type="rev-recd">
          <day>21</day>
          <month>08</month>
          <year>2014</year>
        </date>
        <date date-type="accepted">
          <day>06</day>
          <month>10</month>
          <year>2014</year>
        </date>
      </history>
      <permissions>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0/">
          <license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
        </license>
      </permissions>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>Hypertension</kwd>
        <kwd>Sympatectomy</kwd>
        <kwd>Medication Therapy</kwd>
        <kwd>Management</kwd>
        <kwd>Hypotension</kwd>
      </kwd-group>
      <counts>
        <fig-count count="2"/>
        <table-count count="0"/>
        <equation-count count="0"/>
        <ref-count count="10"/>
        <page-count count="3"/>
      </counts>
      <pub-date pub-type="epub-ppub">
        <month>08</month>
        <year>2015</year>
      </pub-date>
    </article-meta>
  </front>
  <body>
    <sec sec-type="intro">
      <title>Introduction</title>
      <p>A 67-year-old woman with drug-refractory essential hypertension was admitted for renal sympathetic denervation (RDN). The secondary causes of hypertension were fully investigated in this patient. A 24-h ambulatory blood pressure (BP) monitor documented a mean daytime BP of 172/101 mmHg, a mean nighttime BP of 151/84 mmHg, and an overall mean BP of 167/97 mmHg despite compliance with metoprolol (50 mg twice daily), amlodipine (10 mg once daily), lisinopril (20 mg once daily), prazosin (2 mg thrice daily), and hydrochlorothiazide (50 mg once daily).</p>
      <p>The patient was fasted for 4 h. Her usual antihypertensive drug therapy was continued. After the administration of 5,000 international units of heparin and 100 <italic>&#956;</italic>g of fentanyl, a 7-F Renal Double Curve guide catheter (Cordis Corporation, Fremont, CA ,USA) was inserted into the right renal artery (no accessory vessel). A 0.014-in Runthrough floppy guide wire (Terumo Medical Corporation, Somerset, NJ, USA) was advanced into place. A 6-mm ONESHOT<sup>TM</sup> (Covidien, Mansfield, MA, USA) irrigated RDN balloon was advanced into place (<xref ref-type="fig" rid="f01">Figure 1</xref>), and a single ablation was performed. The procedure was then repeated on the other side. The patient remained hemodynamically stable throughout and at the completion of the procedure with a BP of 150/80 mmHg. Hemostasis was achieved with the Perclose ProGlide Suture-Mediated Closure System (Abbott Vascular, Santa Clara, CA, USA), and the patient was then returned to our ward for monitoring.</p>
      <fig id="f01">
        <label>Figure 1</label>
        <caption>
          <title>Renal Denervation Procedure. Selective angiography performed with a 7-F Renal Double Curve guide catheter in the left anterior oblique 10&#176; projection. Note that a single renal artery supplies each kidney and that the caliber and length of the main renal artery prior to bifurcation is ideally suited to denervation.</title>
        </caption>
        <graphic xlink:href="1678-4170-abc-105-02-0202-50100-gf01.jpg"/></fig>
      <p>One hour later, the patient complained of dizziness and blurring of vision. Her Glasgow Coma Scale score remained 15 with preserved mentation. She was not in pain. Her pulse rate was 87 bpm, and her BP was 77/38 mmHg. However, she appeared well perfused and was clinically euvolemic. There was no evidence of a groin hematoma, and her abdomen was soft. A 12-lead electrocardiogram showed no change, and a transthoracic echocardiogram showed normal left ventricular function. Her hemoglobin level was similar to baseline, and her arterial blood gas levels, including lactate, were unremarkable.</p>
      <p>She was given intravenous dopamine that was titrated to response. At 10 <italic>&#956;</italic>g/kg/min, her BP rose to 120/70 mmHg, and her symptoms resolved entirely. Over the subsequent 48 h, she was extremely sensitive to reductions in the dose of dopamine and exhibited a markedly fluctuating BP. However, by 72 h, the dopamine had been carefully weaned and discontinued. She was discharged home after she remained stable for a further 24 h. At a 3-month review, she remains well with a mean daytime office BP of 124/72 mmHg while on amlodipine (5 mg once daily).</p>
    </sec>
    <sec sec-type="discussion">
      <title>Discussion</title>
      <p>Around 12% of patients with essential hypertension who are considered resistant to conventional therapy have persistently elevated BP despite the use of three or more pharmacological agents<xref ref-type="bibr" rid="B01">1</xref><sup>,</sup><xref ref-type="bibr" rid="B02">2</xref>. In such instances, abnormal renal excretory function, which is largely influenced by renal sympathetic nerve activity, may have a central role<xref ref-type="bibr" rid="B03">3</xref>. Catheter-based RDN, which is a modern incarnation of a historically effective treatment, has recently emerged as a novel therapeutic strategy. Proof of concept and subsequent randomized (unblinded) data that were collected while using the Symplicity<bold>&#174;</bold> catheter (Medtronic, Inc., Minneapolis, MN, USA) have demonstrated reductions in office BP of 20/10, 24/11, 25/11, and 23/11 mmHg at 1, 3, 6, and 12 months, respectively, in a group of patients taking an average of five antihypertensive drugs<xref ref-type="bibr" rid="B04">4</xref><sup>,</sup><xref ref-type="bibr" rid="B05">5</xref>. Such early exciting reports have stimulated the development of numerous other similar devices, including the ONESHOT<sup>TM</sup> catheter that was used in this case<xref ref-type="bibr" rid="B06">6</xref>.</p>
      <p>In some cases, early BP reductions have been reported following RDN. However, in other cases, the response is not always immediate, or it can take several months to appear. Additionally, RDN is associated with a failure rate of 10%-30%, and the only predictor of response in early studies is the magnitude of the systolic BP elevation at baseline<xref ref-type="bibr" rid="B07">7</xref>. Explanations for this broad variability in outcome are uncertain, except that raw BP measurements may lack the sensitivity required for them to be considered a true measure of successful RDN<xref ref-type="bibr" rid="B08">8</xref>. This may in part explain the lackluster performance of RDN in the Symplicity-3 trial, in which RDN failed to demonstrate superiority over conventional treatments when compared to a sham-control procedure<xref ref-type="bibr" rid="B09">9</xref>. However, despite this, the use of RDN does seem to significantly reduce renal norepinephrine spillover<xref ref-type="bibr" rid="B10">10</xref>. Therefore, it is possible that those patients who exhibit more sympathetic over-activity may experience a greater degree of BP reduction with RDN. Because sympathetic over-activity is not routinely measured in clinical practice, this remains speculative.</p>
      <p>Nonetheless, the role of RDN in the treatment of resistant hypertension remains uncertain, but the sustained and impressive BP reductions that were observed in this and other cases should encourage further research to improve the understanding of the mechanisms through which hypertension is mediated and to identify those patients who are likely to achieve the most dramatic responses with RDN.</p>
    </sec>
  </body>
  <back>
    <fn-group>
      <fn fn-type="supported-by">
        <p>
          <bold>Sources of Funding</bold>
        </p>
        <p>There were no external funding sources for this study.</p>
      </fn>
      <fn fn-type="other">
        <p>
          <bold>Study Association</bold>
        </p>
        <p>This study is not associated with any thesis or dissertation work.</p>
      </fn>
    </fn-group>
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            </name>
            <name>
              <surname>Sobotka</surname>
              <given-names>PA</given-names>
            </name>
            <name>
              <surname>Sadowski</surname>
              <given-names>J</given-names>
            </name>
            <name>
              <surname>Bartus</surname>
              <given-names>K</given-names>
            </name>
            <etal/>
          </person-group>
          <article-title>Catheter-based renal sympathetic denervation for resistant hypertension: a multicentre safety and proof-of-principle cohort study</article-title>
          <source>Lancet</source>
          <year>2009</year>
          <volume>373</volume>
          <issue>9671</issue>
          <fpage>1275</fpage>
          <lpage>1281</lpage>
        </element-citation>
      </ref>
    </ref-list>
  </back>
  <sub-article article-type="translation" id="SA1" xml:lang="pt">
    <front-stub>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Relato de Caso</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Hipotens&#227;o Profunda Sustentada ap&#243;s Denerva&#231;&#227;o Renal: Sucesso Dram&#225;tico?</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Sridhar</surname>
            <given-names>Ganiga Srinivasaiah</given-names>
          </name>
          <xref ref-type="aff" rid="aff03">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Watson</surname>
            <given-names>Timothy</given-names>
          </name>
          <xref ref-type="aff" rid="aff03">1</xref>
          <xref ref-type="aff" rid="aff04">2</xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Han</surname>
            <given-names>Chee Kok</given-names>
          </name>
          <xref ref-type="aff" rid="aff03">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Ahmad</surname>
            <given-names>Wan Azman Wan</given-names>
          </name>
          <xref ref-type="aff" rid="aff03">1</xref>
        </contrib>
      </contrib-group>
      <aff id="aff03">
        <label>1</label>
        <institution content-type="orgname">Universidade Malaya</institution>
        <institution content-type="orgdiv1">Medical Center</institution>
        <institution content-type="orgdiv2">Departamento de Cardiologia</institution>
        <addr-line>
          <named-content content-type="city">Kuala Lumpur</named-content>
        </addr-line>
        <country country="MY">Malasia</country>
        <institution content-type="original">Departamento de Cardiologia - Universidade Malaya Medical Center, Kuala Lumpur - Malasia</institution>
        <institution content-type="normalized">University of Malaya</institution>
      </aff>
      <aff id="aff04">
        <label>2</label>
        <institution content-type="orgname">Universidade de Auckland</institution>
        <addr-line>
          <named-content content-type="city">Auckland</named-content>
        </addr-line>
        <country country="NZ">Nova Zel&#226;ndia</country>
        <institution content-type="original">Departamento de Medicina - Universidade de Auckland, Auckland - Nova Zel&#226;ndia</institution>
      </aff>
      <author-notes>
        <corresp id="c02"><bold>Correspond&#234;ncia: Timothy Watson</bold>, Departamento de Cardiologia, Universidade Malaya, Lembah Pantai. CEP 59100, Kuala Lumpur - Malasia. Email: <email>tjw123@me.com</email></corresp>
        <fn fn-type="con">
          <p>
            <bold>Contribui&#231;&#227;o dos autores</bold>
          </p>
          <p>Obten&#231;&#227;o de dados: Sridhar GS, Han CK, Ahmad WAW; Reda&#231;&#227;o do manuscrito: Sridhar GS, Watson T, Han CK, Ahmad WAW; Revis&#227;o cr&#237;tica do manuscrito quanto ao conte&#250;do intelectual importante: Watson T.</p>
        </fn>
        <fn fn-type="conflict">
          <p>
            <bold>Potencial conflito de interesse</bold>
          </p>
          <p>Declaro n&#227;o haver conflito de interesses pertinentes.</p>
        </fn>
      </author-notes>
      <kwd-group xml:lang="pt">
        <title>Palavras-chave</title>
        <kwd>Hipertens&#227;o</kwd>
        <kwd>Simpatectomia</kwd>
        <kwd>Conduta do Tratamento Medicamentoso</kwd>
        <kwd>Hipotens&#227;o</kwd>
      </kwd-group>
    </front-stub>
    <body>
      <sec sec-type="intro">
        <title>Introdu&#231;&#227;o</title>
        <p>Paciente do sexo feminino, 67 anos de idade, portadora de hipertens&#227;o arterial refrat&#225;ria &#224; terapia medicamentosa, foi admitida para a realiza&#231;&#227;o do procedimento de denerva&#231;&#227;o simp&#225;tica renal (DSR). As causas secund&#225;rias de hipertens&#227;o em nossa paciente foram devidamente investigadas. Monitoramento ambulatorial de press&#227;o arterial (PA) de 24 horas registrou PA diurna m&#233;dia de 172/101 mmHg, PA noturna m&#233;dia de 151/84 mmHg e PA m&#233;dia total de 167/97 mmHg apesar do uso de metoprolol 50 mg 2x/dia, amlodipina 10 mg 1x/dia, lisinopril 20 mg 1x/dia, prazosina 2 mg 3x/dia e hidroclorotiazida 50 mg 1x/dia.</p>
        <p>A paciente foi submetida a jejum de 4 horas. O uso de medicamentos comumente aplicados &#224; terapia anti&#8209;hipertensiva foi continuado. Ap&#243;s a administra&#231;&#227;o de 5.000 unidades internacionais de heparina e 100 mcg de fentanil, um cateter guia renal, dupla curva, 7F (Cordis, NJ, USA) foi seletivamente situado na art&#233;ria renal direita (sem vaso acess&#243;rio). Um fio guia flex&#237;vel Runthrough de 0,014 polegadas (Terumo Medical, JP) foi utilizado e um cateter&#8209;bal&#227;o de irriga&#231;&#227;o por radiofrequ&#234;ncia (RF) ONESHOT<sup>TM</sup> (Covidien, MA, USA), de 6 mm foi administrado no local (<xref ref-type="fig" rid="f02">figura 1</xref>) e uma &#250;nica abla&#231;&#227;o realizada. O mesmo procedimento foi ent&#227;o repetido contra&#8209;lateralmente. A paciente manteve-se hemodinamicamente est&#225;vel ao longo e ao t&#233;rmino do procedimento com PA de 150/80 mmHg. Hemostasia foi conseguida ap&#243;s a realiza&#231;&#227;o de uma &#250;nica sutura com Perclose ProGlide (Abbott Vascular, CA, USA), retornarndo &#224; enfermaria para o monitoramento.</p>
        <fig id="f02">
          <label>Figura 1</label>
          <caption>
            <title>Procedimento de Denerva&#231;&#227;o Renal. Angiografia seletiva realizada pela utiliza&#231;&#227;o de um cateter guia RDC 7F na proje&#231;&#227;o obl&#237;qua anterior esquerda de 10&#176;. Observe a presen&#231;a de uma &#250;nica art&#233;ria renal abastecendo cada rim e como o calibre e comprimento da art&#233;ria renal principal, antes de bifurca&#231;&#227;o, &#233; perfeitamente adequado para a denerva&#231;&#227;o.</title>
          </caption>
          <graphic xlink:href="1678-4170-abc-105-02-0202-50100-gf01-pt.jpg"/></fig>
        <p>Uma hora depois, a paciente queixou-se de tontura e vis&#227;o turva. Sua Escala de Coma de Glasgow (ECGl) permaneceu 15, com atividade mental preservada. A paciente n&#227;o reportou dores. Seu pulso foi 87 bpm e PA 77/38 mmHg. Apesar disso, a paciente demonstrou uma boa perfus&#227;o e manteve-se clinicamente euvol&#234;mica. N&#227;o foi observada nenhuma evid&#234;ncia de hematoma na virilha e a regi&#227;o abdominal nao demonstrou sinais de endurecimento. O ECG de 12 deriva&#231;&#245;es n&#227;o apresentou nenhuma altera&#231;&#227;o e o ecocardiograma transtor&#225;cico mostrou fun&#231;&#227;o ventricular esquerda normal. Resultados de hemoglobina foram semelhantes ao da linha de base e a gasometria arterial, incluindo lactato, normal.</p>
        <p>A paciente foi submetida &#224; tratamento intravenoso com dosagem de dopamina titulada &#224; resposta cl&#237;nica. Aos 10 mcg/kg/min houve aumento de sua PA para 120/70 mmHg e seus sintomas desapareceram completamente. Ao longo das 48 horas seguintes, ela mostrou-se extremamente sens&#237;vel &#224; redu&#231;&#227;o da dose de dopamina com acentuada flutua&#231;&#227;o da PA. No entanto, dentro de 72 horas, a administra&#231;&#227;o de dopamina foi cautelosamente diminu&#237;da e descontinuada. A paciente recebeu alta hospitalar, uma vez permanecido est&#225;vel por mais de 24 horas. Em sua avalia&#231;&#227;o de 3 meses, apresentou boas condi&#231;&#245;es gerais, com PA diurna medida no consult&#243;rio m&#233;dico de 124/72 mmHg com uso terap&#234;utico de amlodipina 5 mg 1x/dia.</p>
      </sec>
      <sec sec-type="discussion">
        <title>Discuss&#227;o</title>
        <p>Cerca de 12% dos pacientes com hipertens&#227;o essencial s&#227;o considerados resistentes &#224; terapia convencional e apresentam PA persistentemente elevada apesar da presen&#231;a de tr&#234;s ou mais agentes farmacol&#243;gicos<xref ref-type="bibr" rid="B01">1</xref><sup>,</sup><xref ref-type="bibr" rid="B02">2</xref>. Em tais casos, a fun&#231;&#227;o renal excretora anormal, em grande parte influenciada pela atividade nervosa simp&#225;tica renal, pode ter um papel central<xref ref-type="bibr" rid="B03">3</xref>. DSR com cateter, uma encarna&#231;&#227;o moderna de um tratamento historicamente eficaz, emergiu recentemente como uma nova estrat&#233;gia terap&#234;utica. Como prova do seu conceito, subseq&#252;entes dados (dados n&#227;o cegos) ao acaso, com o uso do cateter Symplicity&#174; (Medtronic, MN, USA) demonstraram redu&#231;&#227;o absoluta da PA medida no consult&#243;rio m&#233;dico de 20/10, 24/11, 25/11 e 23/11 mmHg dentro de 1, 3, 6 e 12 meses, respectivamente, entre um grupo de pacientes que usam, em m&#233;dia, cinco medicamentos anti-hipertensivos<xref ref-type="bibr" rid="B04">4</xref><sup>,</sup><xref ref-type="bibr" rid="B05">5</xref>. Estes relat&#243;rios iniciais com resultados animadores estimularam o desenvolvimento de numerosos outros dispositivos semelhantes ao mencionado acima, incluindo o cateter ONESHOT<sup>TM</sup> utilizado neste caso<xref ref-type="bibr" rid="B06">6</xref>.</p>
        <p>Embora em alguns casos a redu&#231;&#227;o precoce da PA ap&#243;s DSR tenha sido relatada, a resposta nem sempre &#233; imediata e, em muitos casos, pode-se levar v&#225;rios meses a ser determinada. Al&#233;m disso, DSR est&#225; associada &#224; uma taxa de "falha" de 10-30%, tendo-se como o &#250;nico preditor de resposta nos estudos iniciais a magnitude da eleva&#231;&#227;o da linha de base da PA sist&#243;lica<xref ref-type="bibr" rid="B07">7</xref>. Explica&#231;&#245;es para essa alta variabilidade de resultados s&#227;o incertas, mas deve-se considerar que medi&#231;&#245;es de PA por si s&#243;, podem n&#227;o ser sens&#237;veis o suficiente para serem consideradas medidas verdadeiras do sucesso da DSR<xref ref-type="bibr" rid="B08">8</xref>. Isso pode em parte explicar o baixo desempenho no ensaio cl&#237;nico do Symplicity-3, onde a DSR n&#227;o conseguiu demonstrar superioridade sobre os tratamentos convencionais num estudo cego quando comparado a um procedimento simulado<xref ref-type="bibr" rid="B09">9</xref>. No entanto, apesar disso, o uso de DSR parece reduzir significativamente a distribui&#231;&#227;o renal excedente de norepinefrina<xref ref-type="bibr" rid="B10">10</xref>. Portanto, pode-se prever que os pacientes que apresentam mais hiperatividade simp&#225;tica podem experienciar um grau maior de redu&#231;&#227;o na PA. Como esta avalia&#231;&#227;o n&#227;o &#233; utilizada rotineiramente na pr&#225;tica cl&#237;nica, essa hip&#243;tese continua sendo especulativa.</p>
        <p>No entanto, a situa&#231;&#227;o da DSR para o tratamento de hipertens&#227;o resistente permanece incerta, mas dados impressionantes na redu&#231;&#227;o de PA observada neste e em outros casos, devem contribuir para o incentivo de mais pesquisas para melhorar e aumentar a compreens&#227;o dos mecanismos atrav&#233;s dos quais a hipertens&#227;o &#233; mediada assim como a identifica&#231;&#227;o dos pacientes que s&#227;o suscept&#237;veis a conseguir uma resposta mais dram&#225;tica.</p>
      </sec>
    </body>
    <back>
      <fn-group>
        <fn fn-type="supported-by">
          <p>
            <bold>Fontes de financiamento</bold>
          </p>
          <p>O presente estudo n&#227;o teve fontes de financiamento externas.</p>
        </fn>
        <fn fn-type="other">
          <p>
            <bold>Vincula&#231;&#227;o acad&#234;mica</bold>
          </p>
          <p>N&#227;o h&#225; vincula&#231;&#227;o deste estudo a programas de p&#243;s&#8209;gradua&#231;&#227;o.</p>
        </fn>
      </fn-group>
    </back>
  </sub-article>
</article>
