Describe in detail: $ECG$.
(N/A) $ECG$ 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 to the left ankle) that continuously monitor the heart activity.
Each peak in the $ECG$ is identified with a letter from $P$ to $T$ that corresponds to a specific electrical activity of the heart.
The $P$-wave represents the electrical excitation (or depolarisation) of the atria,which leads to the contraction of both the atria.
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 $T$-wave represents the return of the ventricles from an excited state to a normal state (repolarisation). The end of the $T$-wave marks the end of systole.
By counting the number of $QRS$ complexes that occur in a given time period,one can determine the heart beat rate of an individual.
Any deviation in the shape of the $ECG$ indicates a possible abnormality or disease. Hence,it is of great clinical importance.
$A$ patient is connected to the machine with three electrical leads (one to each wrist and to the left ankle) that continuously monitor the heart activity.
Each peak in the $ECG$ is identified with a letter from $P$ to $T$ that corresponds to a specific electrical activity of the heart.
The $P$-wave represents the electrical excitation (or depolarisation) of the atria,which leads to the contraction of both the atria.
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 $T$-wave represents the return of the ventricles from an excited state to a normal state (repolarisation). The end of the $T$-wave marks the end of systole.
By counting the number of $QRS$ complexes that occur in a given time period,one can determine the heart beat rate of an individual.
Any deviation in the shape of the $ECG$ indicates a possible abnormality or disease. Hence,it is of great clinical importance.
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Similar Questions
Given below are two statements.
Statement $I$ - Graphical recording of electrical variations detected at the surface of body during their propagation through the wall of heart is electrocardiograph.
Statement $II$ - The instrument used for the graphical recording of electrical variations detected at the surface of body during their propagation through wall of heart is electrocardiogram.
In the light of above statements,select the correct option given below:
Statement $I$ - Graphical recording of electrical variations detected at the surface of body during their propagation through the wall of heart is electrocardiograph.
Statement $II$ - The instrument used for the graphical recording of electrical variations detected at the surface of body during their propagation through wall of heart is electrocardiogram.
In the light of above statements,select the correct option given below:
What does a sphygmomanometer measure?
In $ECG$,the $T$-wave represents:
Medium
View SolutionWhich of the following sentences is correct?
$I$. $ECG$ is of a great clinical significance.
$II$. Electrocardiograph is the machine used to obtain an electrocardiogram.
$III$. To obtain a standard $ECG$,a patient is connected to the machine with $3$ electrical leads (one to each wrist and to the left ankle).
$IV$. Normal activities of the heart are regulated intrinsically (auto-regulated by nodal tissue).
$V$. Electrocardiogram is the graphical representation of the electrical activity of the heart during a cardiac cycle.
Which of the following options contains all the correct statements?
$I$. $ECG$ is of a great clinical significance.
$II$. Electrocardiograph is the machine used to obtain an electrocardiogram.
$III$. To obtain a standard $ECG$,a patient is connected to the machine with $3$ electrical leads (one to each wrist and to the left ankle).
$IV$. Normal activities of the heart are regulated intrinsically (auto-regulated by nodal tissue).
$V$. Electrocardiogram is the graphical representation of the electrical activity of the heart during a cardiac cycle.
Which of the following options contains all the correct statements?
Medium
View SolutionMatch the Column $-I$ with Column $-II$.
Column $-I$ Column $-II$ $(a) \; P-$wave $(i) \; \text{Depolarisation of ventricles}$ $(b) \; QRS$ complex $(ii) \; \text{Repolarisation of ventricles}$ $(c) \; T-$wave $(iii) \; \text{Coronary ischemia}$ $(d) \; \text{Reduction in the size of } T-$wave $(iv) \; \text{Depolarisation of atria}$ $(v) \; \text{Repolarisation of atria}$
Select the correct option:
$(a) \quad (b) \quad (c) \quad (d)$
| Column $-I$ | Column $-II$ |
| $(a) \; P-$wave | $(i) \; \text{Depolarisation of ventricles}$ |
| $(b) \; QRS$ complex | $(ii) \; \text{Repolarisation of ventricles}$ |
| $(c) \; T-$wave | $(iii) \; \text{Coronary ischemia}$ |
| $(d) \; \text{Reduction in the size of } T-$wave | $(iv) \; \text{Depolarisation of atria}$ |
| $(v) \; \text{Repolarisation of atria}$ |
Select the correct option:
$(a) \quad (b) \quad (c) \quad (d)$
MediumNEET 2019
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