The use of the first derivative of apex cardiogram and echocardiographic dimensions for assessing left verntircular fibre lengthening in cardiomyopathy

Eleven patients with hypertrophic obstructive cardiomyopathy (HOCM) and nine patients with congestive cardiomyopathy (COCM) were studied to determine the usefulness of relaxation time and mean velocity of circumferential fibre lengthening (VCFJ obtained from the first derivative of apex cardiogram and echocardiographic left ventricular dimensions. Twenty-two normal patients were ± investigated by echo and apex cardiography and served as controls. In HOCM both early apex cardiographic relaxation time interval (ERT) and total apex cardiographic relaxation time interval (TRT) were increased (ERT: 16 ±9 ms v. 5 ± 4 ms in controls, P

Keywords:

• Derivative
• Cardiology
• Apex (geometry)
• Cardiomyopathy
• Congestive Cardiomyopathy
• Obstructive cardiomyopathy
• Internal medicine
• Multifunction cardiogram
• Hypertrophic cardiomyopathy
• Medicine

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