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ECG Interpretation: Atrial and Ventricular Enlargement

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ECG Interpretation: Atrial and Ventricular Enlargement

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Questions and Answers

What is the characteristic of the P wave in complete heart block?

Regular PR interval

Constant PR interval

No P wave

Variable PR intervals (correct)

What is the origin of sinus rhythm in the heart?

Bundle of His

AV node

SA node (correct)

Ventricular muscle

What is the characteristic of the QRS complex in sinus bradycardia?

Normal shape and rate greater than 100/min

Broad and bizarre shaped

Normal shape and rate less than 60/min (correct)

Irregular and irregular rate

What is the characteristic of the ventricular rate in atrial fibrillation?

Between 75-190/min (D) Signup and view all the answers

What is the characteristic of the PR interval in complete heart block?

Variable PR intervals (B) Signup and view all the answers

What is the relationship between the atrial rate and ventricular rate in atrial fibrillation?

The ventricular rate is limited to a maximum of 125/min (D) Signup and view all the answers

What is the characteristic of P wave in lead II for right atrial enlargement?

Tall and peaked (C) Signup and view all the answers

What is the cause of left atrial enlargement?

Mitral stenosis (A) Signup and view all the answers

What is the characteristic of right ventricular enlargement?

Tall R in V6 and deep S in V6 (A) Signup and view all the answers

What is the indication of ischemia?

Inverted T wave (D) Signup and view all the answers

What is the characteristic of first-degree heart block?

PR interval is fixed and prolonged (D) Signup and view all the answers

What is the characteristic of second-degree heart block Mobitz type 1?

Progressive lengthening of the PR interval followed by an absence of the QRS (B) Signup and view all the answers

What is the characteristic of third-degree heart block?

Complete heart block with atrial contraction normal (B) Signup and view all the answers

What is the characteristic of left ventricular enlargement?

Deep S in V1 and V2, and tall R in V5 and V6 (B) Signup and view all the answers