PATHOLOGY MCQ
HEART
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The machine (electro-cardiogram) is used to obtain an electrocardiograph (ECG).
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To obtain a standard ECG a patient is connected to the machine with three electrical leads that continuously monitor the heart activity.
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By counting the number of QRS complexes that occur in a given time period, one can determine the heart beat rate of an individual.
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The T-wave represents the return of the ventricles from excited to normal state.
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Detailed explanation-1: -An electrocardiogram (ECG) is one of the simplest and fastest tests used to evaluate the heart. Electrodes (small, plastic patches that stick to the skin) are placed at certain spots on the chest, arms, and legs. The electrodes are connected to an ECG machine by lead wires.
Detailed explanation-2: -ECG and EKG are different abbreviations for the same test, called an electrocardiogram. An electrocardiogram is a test to measure how the electricity in a person’s heart is functioning. People may also refer to an electrocardiogram as an electrocardiograph.
Detailed explanation-3: -An ECG is used to see how the heart is functioning. It mainly records how often the heart beats (heart rate) and how regularly it beats (heart rhythm). It can give us important information, for instance about possible narrowing of the coronary arteries, a heart attack or an irregular heartbeat like atrial fibrillation.