Given below is the ECG of a normal human. Which one of its components in human 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
Steps to obtain a standard ECG -
Each peak in the ECG is identified with a letter from P to T that corresponds to a specific electrical activity of the heart.
- wherein
The P-wave -
The P-wave represents the electrical excitation (or depolarisation) of the atria,
- wherein
which leads to the contraction of both the atria.
The QRS Complex -
The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction.
- wherein
The contraction starts shortly after Q and marks the beginning of the systole.
The T-wave -
The T-wave represents the return of the ventricles from excited to normal state (repolarisation).
- wherein
The end of the T-wave marks the end of systole.
Option 1)
Complex QRS- One complete Pulse
Incorrect
Option 2)
Peak T - Initiation of total cardiac contraction
Incorrect
Option 3)
Peak P and Peak R together -Systolic and diastolic blood pressures
Correct
Option 4)
Peak P - Initiation of left atrial contraction only
Incorrect