Which arrhythmia is most commonly associated with pneumoperitoneum during laparoscopic procedures?

Which arrhythmia is most commonly associated with pneumoperitoneum during laparoscopic procedures?

• A. Bradycardia
• B. Sinus tachycardia
• C. PVCs
• D. Atrial fibrillation

Answer: (B)

When gas is insufflated to create the pneumoperitoneum, several body responses come into play. The rising intra-abdominal pressure reduces venous return and can lower stroke volume, while CO2 absorbed into the bloodstream increases PaCO2, triggering sympathetic stimulation. The combination of these factors raises heart rate as a normal compensatory mechanism to maintain cardiac output. This tendency toward a regular, faster heart rate is sinus tachycardia, making it the most commonly observed arrhythmia during pneumoperitoneum. Bradycardia can occur but is less common and usually related to high insufflation pressures provoking vagal reflexes. PVCs or atrial fibrillation are not typical in the usual intraoperative course without other contributing problems.

When gas is insufflated to create the pneumoperitoneum, several body responses come into play. The rising intra-abdominal pressure reduces venous return and can lower stroke volume, while CO2 absorbed into the bloodstream increases PaCO2, triggering sympathetic stimulation. The combination of these factors raises heart rate as a normal compensatory mechanism to maintain cardiac output. This tendency toward a regular, faster heart rate is sinus tachycardia, making it the most commonly observed arrhythmia during pneumoperitoneum.

Bradycardia can occur but is less common and usually related to high insufflation pressures provoking vagal reflexes. PVCs or atrial fibrillation are not typical in the usual intraoperative course without other contributing problems.