Cardiac Cycle

IMPORTANT

Cardiac Cycle: Overview

This Topic covers sub-topics such as Cardiac Cycle, Cardiac Output, Electrocardiogram, Atrial Systole, Ventricular Systole, Joint Diastole, P-wave in Electrocardiogram, T-wave in Electrocardiogram and, QRS complex in Electrocardiogram

Important Questions on Cardiac Cycle

HARD
IMPORTANT

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

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MEDIUM
IMPORTANT

P-wave in a ECG represents:

MEDIUM
IMPORTANT

When ventricular systole occurs:

MEDIUM
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T-wave is corresponding to:

EASY
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During the cardiac cycle, the ventricular systole starts about 0.1s after the atrial systole. This allows atria to be completely empty their contents to ventricles. Which one of the following is a major reason for this delay?

HARD
IMPORTANT

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The above ECG indicates the following disorder

MEDIUM
IMPORTANT

Match the following

  List - I   List - II
a Enlarged P wave i Hyper calcimia
b Prolonged Q-T interval ii Tachy cardia
c Prolonged P-R interval iii Brady cardia
d Shortened P-R interval iv Myocardial infraction
    v Enlarged atria
The correct answer is

EASY
IMPORTANT

Which one of the following is a matching pair?

a) Lubb - sharp closure of AV valves at the beginning of ventricular systole

b) Dub - sudden opening of semilunar valves at the beginning of ventricular diastole

c) Pulsation of the radial artery - valves in the Arteries

d) Initiation of the heart beat - Purkinje fibres

MEDIUM
IMPORTANT

During ventricular systole in a mammalian heart the

EASY
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ECG depicts the depolarization and repolarization processes during the cardiac cycle. In the ECG of a normal healthy individual, one of the following waves is not represented.

MEDIUM
IMPORTANT

P wave of ECG indicates:
1. Activation of SA node.
2. Depolarization of atrial muscles.
3. Spread of excitation from AV node to Purkinje fibres.
4. Repolarisation of atria and depolarization of ventricles.

EASY
IMPORTANT

During systole of heart 

MEDIUM
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Identify the correct sequence of events in a cardiac cycle.

EASY
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The duration of the cardiac cycle in a normal man is 

EASY
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The diagram given here is the standard ECG of a normal person. The P- wave represents the?

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MEDIUM
IMPORTANT

Find out the wrong statement.

EASY
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In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

MEDIUM
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In ECG, what is represented by P-wave, QRS complex and T-wave respectively?

MEDIUM
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What P indicates in ECG?

EASY
IMPORTANT

What is the result of systole?