PR interval in ECG denotes ?: (A) Isovolumetric contraction of ventricle, (B) Insovolumetric relaxation of hea, (C) Atrial contraction, (D) None
Answer is C. Ans. is 'c' i.e., Atrial contractionPR interval represents atrial depolarization (atrial contraction) and condution throught AV nudeElectrocardiogram Normal ECG in a bipolar limb leads typically shows five waves named P, Q, R, S and T. Q, R and S waves are collectively called QRS complex.