ECG Multiple Choice Questions (Exam) wth
answers
What is the width of the normal QRS complex? - ans-Not wider than 3 mm
xz xz xz xz xz xz xz xz xz xz xz xz xz xz
Which of the following ECG abnormalities is most life threatening? - ans-
xz xz xz xz xz xz xz xz xz xz xz
Elevated ST segment xz xz
The QRS of an ECG falls on a dark vertical line of the ECG paper. Subsequent QRS comple
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
xes fall on every other dark line (10 mm apart). What is the ventricular rate? - ans-150/min
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
What medication is most useful for the treatment of premature ventricular contractions? -
xz xz xz xz xz xz xz xz xz xz xz xz
ans-Lidocaine
xz
Which of the following criteria applies to third-degree block? - ans-
xz xz xz xz xz xz xz xz xz xz
There is no relationship between the P waves and the QRS complexes.
xz xz xz xz xz xz xz xz xz xz xz
Which of the following waves represents depolarization of the ventricles? - ans-QRS wave
xz xz xz xz xz xz xz xz xz xz xz xz
What structure serves as the backup pacemaker for the heart? - ans-
xz xz xz xz xz xz xz xz xz xz xz
Atrioventricular (AV) node xz xz
What is implied by an abnormally prolonged PR interval? - ans-Atrioventricular block
xz xz xz xz xz xz xz xz xz xz xz
What is the normal maximum length of the P wave? - ans-3 mm
xz xz xz xz xz xz xz xz xz xz xz xz
A patient taking an ECG shows a regular sawtooth pattern with 30 P waves within a 6-
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
sec interval (30 large boxes). What course of treatment should this patient receive for this ar
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
rhythmia?
1. Calcium channel blockers
xz xz xz
2. Digoxin
xz
3. Cardioversion
xz
4. Defibrillation - ans-1, 2, and 3 only
xz xz xz xz xz xz xz
What type of medications may lead to first-degree heart block? - ans-Beta blockers
xz xz xz xz xz xz xz xz xz xz xz xz
Which of the following medications is used to treat symptomatic sinus bradycardia? - ans-
xz xz xz xz xz xz xz xz xz xz xz xz xz
Atropine
What is the normal period of time for the PR interval? - ans-Not longer than 0.20 sec
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
A run of three or more PVCs should be called: - ans-ventricular tachycardia.
xz xz xz xz xz xz xz xz xz xz xz xz
answers
What is the width of the normal QRS complex? - ans-Not wider than 3 mm
xz xz xz xz xz xz xz xz xz xz xz xz xz xz
Which of the following ECG abnormalities is most life threatening? - ans-
xz xz xz xz xz xz xz xz xz xz xz
Elevated ST segment xz xz
The QRS of an ECG falls on a dark vertical line of the ECG paper. Subsequent QRS comple
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
xes fall on every other dark line (10 mm apart). What is the ventricular rate? - ans-150/min
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
What medication is most useful for the treatment of premature ventricular contractions? -
xz xz xz xz xz xz xz xz xz xz xz xz
ans-Lidocaine
xz
Which of the following criteria applies to third-degree block? - ans-
xz xz xz xz xz xz xz xz xz xz
There is no relationship between the P waves and the QRS complexes.
xz xz xz xz xz xz xz xz xz xz xz
Which of the following waves represents depolarization of the ventricles? - ans-QRS wave
xz xz xz xz xz xz xz xz xz xz xz xz
What structure serves as the backup pacemaker for the heart? - ans-
xz xz xz xz xz xz xz xz xz xz xz
Atrioventricular (AV) node xz xz
What is implied by an abnormally prolonged PR interval? - ans-Atrioventricular block
xz xz xz xz xz xz xz xz xz xz xz
What is the normal maximum length of the P wave? - ans-3 mm
xz xz xz xz xz xz xz xz xz xz xz xz
A patient taking an ECG shows a regular sawtooth pattern with 30 P waves within a 6-
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
sec interval (30 large boxes). What course of treatment should this patient receive for this ar
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
rhythmia?
1. Calcium channel blockers
xz xz xz
2. Digoxin
xz
3. Cardioversion
xz
4. Defibrillation - ans-1, 2, and 3 only
xz xz xz xz xz xz xz
What type of medications may lead to first-degree heart block? - ans-Beta blockers
xz xz xz xz xz xz xz xz xz xz xz xz
Which of the following medications is used to treat symptomatic sinus bradycardia? - ans-
xz xz xz xz xz xz xz xz xz xz xz xz xz
Atropine
What is the normal period of time for the PR interval? - ans-Not longer than 0.20 sec
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz
A run of three or more PVCs should be called: - ans-ventricular tachycardia.
xz xz xz xz xz xz xz xz xz xz xz xz
