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Cardiac Cycle And ECG Flashcards

1
Q

What is joint diastole?

A

All four chambers are relaxed.

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2
Q

How much ventricle is filled during first rapid filling/Joint diastole?

A

70% or 2/3 rd

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3
Q

How much ventricle is filled during 2nd rapid filling/Atrial systole?

A

30% or 1/3rd

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4
Q

What is name of first heart sound?
When it occurs?

A

Lub
When AV valve closes during ventricular systole

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5
Q

What is name of the second heart Sound?
When it occurs?

A

Dub
When semilunar valve closes during Ventricular diastole

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6
Q

Which heart sound has low pitch?

A

Lub

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7
Q

Which heart sound has longer duration?

A

Lub

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8
Q

What is Isovolumetric systole?

A

Duration between closure of AV valve and opening of Semilunar valve

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9
Q

What is Isovolumetric diastole?

A

Duration between closure of Semilunar valve and opening of Av Valve.

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10
Q

Duration of Atrial systole and diastole?

A

Systole- 0.1s
Diastole-0.7s

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11
Q

Duration of Ventricular systole and diastole?

A

Systole-0.3s
Diastole-0.5s

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12
Q

Duration of 1 cardiac cycle?

A

0.8s

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13
Q

No.of cardiac cycle per minute?

A

60/0.8= 72

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14
Q

What is EDV?Amount of it of a normal human?

A

Vol. of blood fill in each ventricle at end of diastole
120ml

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15
Q

What is ESV?Amount of it?Relation with EDV.

A

Vol. of blood remaining in each ventricle at end of systole
50 ml
ESV=EDV-SV

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16
Q

What is Stroke Volume?amount?

A

Volume of blood pumped by each ventricle during each systole.
70 ml

17
Q

What is Cardiac Output?relation.

A

Vol. Of blood pumped by each ventricle.
Co=Heart beat rate×stroke vol.
=5000ml /minute

18
Q

Where are the leads placed in ECG

A

3 leads
1 in each wrist and 1 in left ankle

19
Q

What is the name of the machine of ECG?

A

Electrocardiograph

20
Q

What is the name of the graph of ECG?

A

Electrocardiogram

21
Q

What is the name of the technique of ECG?

A

Electrocardiography

22
Q

What is represented P wave of ECG ?

A

Atrial depolarization
Contraction of both atria

23
Q

What is represented QRS complex of ECG ?

A

Depolarization of ventricle
Ventricular systole

24
Q

When Ventricular systole starts and ends according to ECG?

A

Shortly after Q
End of T Wave

25
Q

What is represented T wave of ECG ?

A

Ventricular Repolarization

26
Q

What is the relationship between QRS complex and heartbeat rate?

A

Heartbeat rate= no of QRS complex in a given time

27
Q

What is indicated by enlargement of P wave?

A

Enlargement of atria

28
Q

What is indicated by enlargement of QRS complex?

A

Myocardial Infarction/Heart attack

29
Q

What is indicated by enlargement of ST interval?

A

Myocardial Infarction/Heart attack

30
Q

What is indicated by depression of ST interval?

A

Insufficient o2 supply

31
Q

What is indicated by Flat T wave?

A

Insufficient o2 supply

32
Q

How much long is Normal PR interval ?

Body Fluid And Circulation (6 decks)

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