2024年10月8日 · A form of 2nd degree AV block in which there is intermittent non-conducted P waves without progressive prolongation of the PR interval

Second-degree AV block is defined by the intermittent failure of atrial impulses to conduct to the ventricles, resulting in some P-waves not being followed by QRS complexes. This condition is further categorized into two distinct subtypes: type 1 (also known as Mobitz type 1 or Wenckebach block) and type 2 (referred to as Mobitz type 2) .

Second-degree atrioventricular block (AV block) is a disease of the electrical conduction system of the heart. It is a conduction block between the atria and ventricles. The presence of second-degree AV block is diagnosed when one or more (but not all) of the atrial impulses fail to conduct to the ventricles due to impaired conduction.

Heart block is a problem with your heartbeat signal moving from the upper to lower part of your heart. The signal can only get through sometimes, or not at all. This makes your heart beat slowly or skip beats. People with second-degree or third-degree heart block may experience fainting, tiredness and shortness of breath.

2023年8月14日 · There are two types of second-degree atrioventricular blocks: Mobitz type I, also known as Wenckebach and Mobitz type II. This activity examines when this condition should be considered on differential diagnosis and how to properly evaluate for it.

A second-degree atrioventricular (AV) block type II is also known as Mobitz type II second-degree AV block. This bradycardic rhythm is identified through an electrocardiogram (ECG) and is caused by an irregular block of atrioventricular conduction below the AV node.

2024年10月8日 · Second degree heart block (2nd degree AV block) with a P:QRS ratio of 3:1 or higher, producing an extremely slow ventricular rate.

Second-degree AV block Mobitz type II and third-degree AV block: These cases should almost invariably receive a pacemaker. In the case of Mobitz type 2 with wide QRS complexes, a pacemaker is indicated even in the absence of symptoms.

2024年10月8日 · Second degree heart block with a fixed ratio of P waves: QRS complexes (e.g. 2:1, 3:1, 4:1). Fixed ratio blocks can be the result of either Mobitz I or Mobitz II conduction. The atrial rate is approximately 75 bpm. The ventricular rate is approximately 38 bpm. Non-conducted P waves are superimposed on the end of each T wave.

Second-degree AV block is subdivided into the following variants: Second-degree AV block Mobitz type 1. May also be referred to as Wenckebach block. Second-degree AV block Mobitz type 2. Second-degree AV block (particularly Mobitz type 2) requires treatment. Synonyms: complete heart block, AV dissociation, AV block III, AV block 3.