"What is Third-Degree Atrioventricular Block?"

Third-degree atrioventricular block (AV block) is a serious cardiac arrhythmia characterized by near-complete obstruction of electrical signal conduction between the atrium and ventricle, resulting in the ventricle failing to beat in sync with the atrium's rhythm.

Definition of Third-degree AV Block

Third-degree AV block occurs when impulses originating above the atrioventricular junction are completely unable to traverse the blocked area, leading to a complete interruption of conduction between the atrium and ventricle. Consequently, none of the atrial impulses reach the ventricle, prompting potential pacemakers below the block site to initiate impulses. This results in independent activities of the atrium and ventricle, with a complete disconnection between them, manifesting as junctional escape rhythm or ventricular escape rhythm, with junctional escape rhythm being more common.

Demographics and Prevalence

Third-degree AV block is more prevalent among individuals over 50 years old, while among younger patients, it is often temporary. Males are more likely to be affected than females. It is crucial for patients to seek prompt medical attention and receive diagnostic evaluation and treatment from a physician.

Lifestyle Recommendations

Maintaining healthy habits and a positive mindset can also contribute to improving cardiac health. This includes getting adequate rest and ensuring sufficient sleep.