Electrocardiograph#!#ECG

Read the following statements (A – D ) (A) QRS complex in ECG indicates ventricular depolarization. (B) The electrocardiograph machine is used to obtain Electrocardiogram a (ECG ) on graph paper . (C) During a cardiac cycle , the left ventricular pumps out about 70 ml is of Oxygenated blood which is called the cardiac output . (D) The second heart sound is associated with the closure of the semilunar valves . How many statements from the above is /are incorrect ?

Statement A : ECG represents electrical activity of heart during a cardiac cycle. Statement B : Electrocardiograph is obtained using electrocardiogram machine.

Cardiac Cycle|Electrocardiograph|Double Circulation|Regulation of Heart|Disorders of Circulatory System

What is electrocardiogram (ECG) ? Name the instrument used to record ECG. What do five waves P, Q, R, S and T of ECG indicate ?

[A] : The record of electric potential that is ini- tiated in the cardiac muscle is known as Electrocardiograph . [R]: This is valuable for preliminary studies of heart muscles.

Which of the following is the diagrammatic representation of standard electrocardiogram (ECG) ?

State whether the following statements are true or false : An earthquake is measured and recorded by using an instrument called electrocardiograph.