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Electrocardiogram (ECG) Quiz with Dr

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Questions and Answers

What does the ECG record?

Electrical changes in the heart during a cardiac cycle (correct)

Blood flow through the heart

Pressure changes in the heart

Heart rate variations

What is the function of an electrocardiograph?

Monitoring heart rate

Amplifying heart sounds

Detecting and recording electrical current spreading from the heart to the body's surface (correct)

Measuring blood pressure

What does the QRS complex in a normal ECG trace represent?

Atrial depolarization

Ventricular depolarization (correct)

Atrial repolarization

Ventricular repolarization

How are the different views of the heart obtained in an ECG?

By comparing electrical activity detected in different electrodes (D) Signup and view all the answers

Which leads in an ECG look at the anterior and lateral surfaces of the left ventricle?

V5, V6 (D) Signup and view all the answers

What is the main functional constituent of the red blood cell?

Hemoglobin (D) Signup and view all the answers

What is the normal range of hematocrit for adult males?

40-45% (B) Signup and view all the answers

What is the structure of red blood cells (RBCs)?

Biconcave non-nucleated discs (A) Signup and view all the answers

What does the hematocrit value indicate?

Percentage of red blood cells in the total blood plasma (A) Signup and view all the answers

What is the normal range of hemoglobin concentration for adult females?

12 (D) Signup and view all the answers