Pazhenkottil (2011) studied dysynchrony in 202 patients who were diagnosed or suspected coronary artery disease by myocardial perfusion imaging, using the diagnostic threshold PSD> 24.4 in men, PSD> 22.3 in female; HBW> 62.3 in men, HBW> 49.8 in wome, which are considered to have left ventricular dyssynchrony.