QRST IS RELATED WITH .....1] VENTRICULAR CONTRACTION OR DEPOLARIZATION 2] AURICULAR CONTRACTION 3] AURICULAR RELAXATION 4] CARDIAC CYCLE
QRST IS RELATED WITH .....1] VENTRICULAR CONTRACTION OR DEPOLARIZATION 2] AURICULAR CONTRACTION 3] AURICULAR RELAXATION 4] CARDIAC CYCLE