Question

The diagram given here is the standard ECG of a normal person. The P-wave represents the:
A. Initiation of ventricular contraction,
B. Beginning of systole
C. End of systole
D. Contraction of both the atria

Answer 1

Hint:- An electrocardiogram (ECG or EKG) records the electrical sign from your heart to check for various heart conditions. Cathodes are put on your chest to record your heart's electrical signs, which cause your heart to pulsate. The signs appear as waves on a connected PC screen or printer.

Complete step-by-step solution:-
- Initiation of ventricular contractions withdraw as reflected in the aortic weight waveform,
- The beginning of systole is the aspect of the cardiovascular cycle during which a few parts of the heart muscle contract subsequent to topping off with blood,
- Amount of blood that is present in the ventricle before heart contraction is defined as the end of systole.
- ECG is a graphical portrayal of the electrical movement of the heart during a cardiovascular cycle. Each peak in the ECG is related to a letter from P to T that relates to a particular electrical action of the heart.
- The P-wave speaks to the electrical excitation (or depolarization) of the atria, which prompts the constriction of both the atria.
Among the given options, the right answer is alternative D.

Note:-
- An electrocardiogram (ECG) is a basic test that can be utilized to check your heart-beat and electrical - movement. Sensors connected to the skin are utilized to distinguish the electrical signs created by your heart each time it beats.
- Einthoven developed the first practical ECG device that worked using a string galvanometer. He was awarded the Nobel prize in medicine for his valuable contribution in 1924.