Poor R wave progression refers to the absence of the normal increase in size of the R wave in the precordial leads when advancing from lead V1 to V6. In lead V1, the R wave should be small.

The waves on an ECG include the P wave, Q wave, R wave, S wave, T wave and U wave. Interval: The time between two specific ECG events. The intervals commonly measured on an ECG include the PR ...

abnormal R wave progression, left anterior fascicular block and atrial fibrillation. Several common heritable cardiomyopathies including HCM, ARVC and familial dilated cardiomyopathy may present with ...