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How will you interpret an electrocardiogram (ECG) in which tim
Biology Exemplar
Biology Exemplar

Class 11

NCERT Exemplar

Publisher:
NCERT
Subject:
Biology
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3

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4

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5

Chapter 5: Morphology of Flowering Plants

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6

Chapter 6: Anatomy of Flowering Plants

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7

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8

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9

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10

Chapter 10: Cell Cycle and Cell Division

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11

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13

Chapter 13: Photosynthesis in Higher Plants

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14

Chapter 14: Respiration in Plants

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15

Chapter 15: Plant Growth and Development

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16

Chapter 16: Digestion and Absorption

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17

Chapter 17: Breathing and Exchange of Gases

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18

Chapter 18: Body Fluids and Circulation

42 questions

Q1
What is the significance of time gap in the passage of action potential from sino-atrial node to the ventricle?
Q2
How will you interpret an electrocardiogram (ECG) in which time taken in QRS complex is higher?
Q3
The walls of ventricles are much thicker than atria. Explain.
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19

Chapter 19: Excretory Products and their Elimination

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20

Chapter 20: Locomotion and Movement

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21

Chapter 21: Neural Control and Coordination

31 questions

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22

Chapter 22: Chemical Coordination and Integration

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Question
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How will you interpret an electrocardiogram (ECG) in which time taken in QRS complex is higher?

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Electrocardiograph (ECG) is a graphical representation of the electrical activity of the heart during a cardiac cycle. A patient is connected to the machine with three electrical leads (one to each wrist and one to the left ankle) that continuously monitor the heart activity. For a detailed evaluation of the heart functions multiple leads are attached to the chest region.
The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction. The contraction starts shortly after Q and marks the beginning of the systole. The time taken in QRS complex is 0.12 second in normal ECG. 
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The larger Q and R wave indicate a myocardial infarction (heart attack). The S-T segment is elevated in acute myocardial infarction and depressed when the heart muscle receives insufficient oxygen.
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Question Text
How will you interpret an electrocardiogram (ECG) in which time taken in QRS complex is higher?
TopicBody Fluids and Circulation
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes135