What condition is characterized by a ventricular rate that is slower than the atrial rate?

What condition is characterized by a ventricular rate that is slower than the atrial rate?

• A. First Degree AV Heart Block
• B. Complete Heart Block
• C. Second Degree AV Heart Block - Type One
• D. Idioventricular Rhythm

Answer: (B)

The condition characterized by a ventricular rate that is slower than the atrial rate is complete heart block. In complete heart block, there is a total dissociation between the atrial and ventricular conduction. The atria continue to depolarize at their normal intrinsic rate, usually driven by the sinoatrial (SA) node, while the ventricles rely on a slower escape rhythm, often originating from the atrioventricular (AV) node or a lower pacemaker site. This results in the ventricles contracting at a much slower rate than the atria, which is a hallmark feature of this condition. In contrast, first-degree AV heart block involves a delay in conduction through the AV node without a complete blockage, meaning that every atrial impulse eventually reaches the ventricles, so their rates remain in sync, albeit with a prolonged PR interval. Second-degree AV heart block Type One (Wenckebach) displays a progressive lengthening of the PR interval until a ventricular beat is dropped, but the atrial and ventricular rhythms are still somewhat connected, just not consistently. An idioventricular rhythm presents with a ventricular rhythm that occurs independently of the atria, often at a slower rate, but does not typically show a dissociation where the

The condition characterized by a ventricular rate that is slower than the atrial rate is complete heart block. In complete heart block, there is a total dissociation between the atrial and ventricular conduction. The atria continue to depolarize at their normal intrinsic rate, usually driven by the sinoatrial (SA) node, while the ventricles rely on a slower escape rhythm, often originating from the atrioventricular (AV) node or a lower pacemaker site. This results in the ventricles contracting at a much slower rate than the atria, which is a hallmark feature of this condition.

In contrast, first-degree AV heart block involves a delay in conduction through the AV node without a complete blockage, meaning that every atrial impulse eventually reaches the ventricles, so their rates remain in sync, albeit with a prolonged PR interval. Second-degree AV heart block Type One (Wenckebach) displays a progressive lengthening of the PR interval until a ventricular beat is dropped, but the atrial and ventricular rhythms are still somewhat connected, just not consistently. An idioventricular rhythm presents with a ventricular rhythm that occurs independently of the atria, often at a slower rate, but does not typically show a dissociation where the