Chronotropic Incompetence in Diabetic Elderly on Echocardiography
Dear editor,
We congratulate the authors of the article on the prognosis of chronotropic incompetence in diabetic elderly undergoing physical stress echocardiography, published in the Arq Bras Cardiol. 2013;100(5):429-43.
When chronotropic deficit is observed on pharmacological stress echocardiography, a relationship is observed with neither prognosis nor prevalence of coronary artery disease, but with sinus node disorders, extrasystoles or dysautonomia, which might be due to dobutamine effects , . We would like to know whether, in those authors’ opinion, the chronotropic deficit can play any prognostic role in pharmacological stress echocardiography.
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