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Given below is the ECG of a normal human. Which one of its components is human, which one of its components is correctly interpreted below?


  • complex QRS - One complete pulse

  • Peak T - Initiation of total cardiac contraction

  • peak P and peak R together - systolic and diastolic blood pressures

  • peak P -Initiation of left atrial contraction only

Answer

C.

peak P and peak R together - systolic and diastolic blood pressures

Each peak in the ECG is identified with a letter from P to T that corresponds to a specific electrical activity of the heart peak P cause diastolic phase in ventricle while peak R cause systole in the ventricle. Thus, peak P and Peak R together represent diastolic and systolic blood pressures. 

Each peak in the ECG is identified with a letter from P to T that corresponds to a specific electrical activity of the heart peak P cause diastolic phase in ventricle while peak R cause systole in the ventricle. Thus, peak P and Peak R together represent diastolic and systolic blood pressures.