Although often ignored, assessment of the electrical axis is an integral part of ECG interpretation. The electrical axis reflects the average direction of ventricular depolarization during ventricular contraction. The direction of the depolarization (and thus the electrical axis) is generally alongside the...
An ECG trace normally reveals a P wave, which corresponds to the atria depolarizing and in turn, contracting. The P wave is followed by a QRS wave, which corresponds to the ventricles depolarizing and in turn contracting. The T wave follows the QRS wave and indicates repolarization of the ve...
rest may produce nonspecific ST-T wave changesduring exercise, may produce ST segment depression increased exercise capacity in those with HF and AFib digitalis no change in exercise or rest HRno change in exercise BPno ECG cgangesno change in exercise capacity inhaled corticosteroids no change in...
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