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(B) The $ECG$ (Electrocardiogram) represents the electrical activity of the heart during a cardiac cycle:$1$. The $P$-wave represents the electrical e

Vedclass · Accepted Answer

$P$-wave: Contraction of both atria; $QRS$-complex: Contraction of both ventricles; $T$-wave: Diastole of all chambers.

Vedclass · Answer

(B) The $ECG$ (Electrocardiogram) represents the electrical activity of the heart during a cardiac cycle:$1$. The $P$-wave represents the electrical excitation (depolarization) of the atria,which leads to the contraction of both atria.$2$. The $QRS$-complex represents the depolarization of the ventricles,which initiates ventricular contraction. This contraction starts shortly after the $Q$ and marks the beginning of the systole.$3$. The $T$-wave represents the return of the ventricles from an excited to a normal state (repolarization). The end of the $T$-wave marks the end of systole and the beginning of ventricular diastole (relaxation of all chambers).

List $I$	List $II$
$A$. $P$-wave	$I$. Beginning of systole
$B$. $Q$-wave	$II$. Repolarisation of ventricles
$C$. $QRS$ complex	$III$. Depolarisation of atria
$D$. $T$-wave	$IV$. Depolarisation of ventricles

Select the correct option for $ECG$.

Similar Questions

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Which of the following is a repolarization wave?

Match List $I$ with List $II$.

List $I$ List $II$

$A$. $P$-wave $I$. Beginning of systole

$B$. $Q$-wave $II$. Repolarisation of ventricles

$C$. $QRS$ complex $III$. Depolarisation of atria

$D$. $T$-wave $IV$. Depolarisation of ventricles

Choose the correct answer from the options given below:

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The following is a diagrammatic representation of a standard $ECG$. Which wave represents the contraction of both atria?

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