Echocardiography and electrocardiogram analysis of hypertrophic cardiomyopathy

Wu Yunying; Zhang Guanghong; Zuo Chunjie

doi:10.3760/cma.j.issn.1673-4777.2014.10.009

Abstract：Objective To evaluate the specificity of hypertrophic cardiomyopathy by echocardiography and electrocardiography (ECG).Methods Totally 23 cases of hypertrophic cardiomyopathy had echocardiography examination.Heart cavity diameter,interventricular septum thickness,left ventricular outflow tract inside diameter and anterior mitral valve systolic forward movement (SAM) were observed.Left ventricular outflow tract maximum blood flow velocity (Vmax) and the velocity of the differential (PGmax) were observed.The standard 12-lead electrocardiogram examination was observed.Results Of 23 patients with hypertrophic cardiomyopathy 19 cases had ST-T of ECG change,15 cases had left ventricular high voltage or left ventricular hypertrophy,4 cases had arrhythmia (one case of atrial fibrillation,one case had Ⅰ degree atrioventricular block sinus bradycardia 2 cases),one case had P wave high point.23 cases had hypertrophic cardiomyopathy of ultrasonic echocardiography,17 cases had asymmetry ventricular septal hypertrophy (4 cases had left ventricular outflow tract obstruction or left ventricular outflow blood flow speed),5 cases had apex of hypertrophic cardiomyopathy,one case had left and right hypertrophied chamber.Cardiac aortic root diameter was (32 ± 4) mm ; left atrial diameter was (41 + 7) mm,left ventricular end-diastolic diameter was (44 ± 9) mm ;left ventricular end systolic diameter was (27 ± 8) mnm; the thickness of the left ventricular posterior wall thickness was (12 ± 2)mm; left ventricular ejection fraction was (69 ± 12)％.Conclusion Echocardiography and electrocardiogram are now the most commonly used and noninvasive tests in the field of clinical cardiovascular examination ; the clinical manifestations of hypertrophic cardiomyopathy are not specific and echocardiography and electrocardiogram examination can improve the diagnostic accuracy.