Atrioventricular Block - Cardiovascular Disorders - Merck Manuals
https://www.merckmanuals.com/professional/cardiovascular-disorders/specific-cardiac-arrhythmias/atrioventricular-block
WebFor third-degree block, there is no relationship between P waves and QRS complexes, and the P wave rate is greater than the QRS rate. First-degree AV block may be physiologic in younger patients with high vagal tone and in well-trained athletes. First-degree AV block is rarely symptomatic, and no treatment is required.
DA: 66 PA: 55 MOZ Rank: 7