Doctors Gates: ECG of Supraventricular tachycardia

ECG of Supraventricular tachycardia

A 36-year-old white female nurse comes to the ER due to a sensation of fast heart rate, slight dizziness, and vague chest fullness. Blood pressure is 110/70. The following rhythm strip is obtained, which shows which of the following?

a.Atrial fibrillation
b.Atrial flutter
c.Supraventricular tachycardia
d.Ventricular tachycardia

The answer is (c).

Paroxysmal supraventricular tachycardia due to AV nodal reentry typically displays a narrow QRS complex without clearly discernible P waves, with a rate in the 160 to 190 range. The atrial rate is faster in atrial flutter, typically with a classic sawtooth pattern of P waves, with AV conduction ratios most commonly 2:1 or 4:1, leading to ventricular rates of 150 or 75 per min.

Atrial fibrillation would show an irregularly irregular rhythm without discrete P waves. Wide QRS complexes with rate greater than 100 would be expected in ventricular tachycardia.

ECG of Supraventricular tachycardia

A 36-year-old white female nurse comes to the ER due to a sensation of fast heart rate, slight dizziness, and vague chest fullness. Blood pressure is 110/70. The following rhythm strip is obtained, which shows which of the following?

a.Atrial fibrillation
b.Atrial flutter
c.Supraventricular tachycardia
d.Ventricular tachycardia

The answer is (c).

Paroxysmal supraventricular tachycardia due to AV nodal reentry typically displays a narrow QRS complex without clearly discernible P waves, with a rate in the 160 to 190 range. The atrial rate is faster in atrial flutter, typically with a classic sawtooth pattern of P waves, with AV conduction ratios most commonly 2:1 or 4:1, leading to ventricular rates of 150 or 75 per min.

Atrial fibrillation would show an irregularly irregular rhythm without discrete P waves. Wide QRS complexes with rate greater than 100 would be expected in ventricular tachycardia.

A 36-year-old white female nurse comes to the ER due to a sensation of fast heart rate, slight dizziness, and vague chest fullness. Blood pressure is 110/70. The following rhythm strip is obtained, which shows which of the following?

a.Atrial fibrillation
b.Atrial flutter
c.Supraventricular tachycardia
d.Ventricular tachycardia

The answer is (c).

Paroxysmal supraventricular tachycardia due to AV nodal reentry typically displays a narrow QRS complex without clearly discernible P waves, with a rate in the 160 to 190 range. The atrial rate is faster in atrial flutter, typically with a classic sawtooth pattern of P waves, with AV conduction ratios most commonly 2:1 or 4:1, leading to ventricular rates of 150 or 75 per min.

Atrial fibrillation would show an irregularly irregular rhythm without discrete P waves. Wide QRS complexes with rate greater than 100 would be expected in ventricular tachycardia.