An electrocardiogram is a picture of the ... of the ECG will be described in the following sections. A normal ECG contains waves, intervals, segments and one complex, as defined below.

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 resting electrocardiogram (ECG ... and impact the amplitude of QRS complexes, P-waves, and T-waves, occasionally resulting also in shortening of the QRS complex and QT interval duration.

If you're scheduled to have an electrocardiogram (EKG), you may wonder ... The whole process is painless, and you can resume your normal activities right after the test. EKGs come in various ...