By counting the number of which of the following waves, the heartbeat of a person can be determined?AP-waveBQRS complexCST-segmentDPQ intervalAnswer: B. QRS complex Read Explanation: By counting the number of QRS complexes that occur in a given period, one can determine the heartbeat rate of an individual. Any deviation from the shapes of the curve indicates a possible abnormality or a disease. Hence, it is of great clinical significance. Read more in App
