What type of arrhythmia is typical atrial flutter classified as?

What type of arrhythmia is typical atrial flutter classified as?

• A. Macro-reentrant
• B. Focal
• C. Multifocal
• D. Ventricular

Answer: (A)

Atrial flutter is classified as a macro-reentrant arrhythmia because it typically involves a large reentrant circuit within the atrium, often around anatomical barriers such as the tricuspid valve and inferior or superior vena cava. This form of reentry is characterized by a continuous and stable tachycardic rhythm that arises from a single reentrant circuit rather than multiple sites of ectopic foci, which would be characteristic of focal or multifocal arrhythmias. Macro-reentry allows for consistent, organized atrial contractions, usually leading to a distinct pattern seen on an electrocardiogram (ECG) known as "sawtooth" waves, particularly in the inferior leads, known as "F-waves." This understanding of macro-reentry provides insight into both the pathophysiology of atrial flutter and its clinical management, especially the targeting of catheter ablation procedures.

Atrial flutter is classified as a macro-reentrant arrhythmia because it typically involves a large reentrant circuit within the atrium, often around anatomical barriers such as the tricuspid valve and inferior or superior vena cava. This form of reentry is characterized by a continuous and stable tachycardic rhythm that arises from a single reentrant circuit rather than multiple sites of ectopic foci, which would be characteristic of focal or multifocal arrhythmias. Macro-reentry allows for consistent, organized atrial contractions, usually leading to a distinct pattern seen on an electrocardiogram (ECG) known as "sawtooth" waves, particularly in the inferior leads, known as "F-waves." This understanding of macro-reentry provides insight into both the pathophysiology of atrial flutter and its clinical management, especially the targeting of catheter ablation procedures.