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Related Experiment Video

Updated: Jul 12, 2026

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

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Hemodynamic collapse during left ventricular lead implantation.

Sujeeth R Punnam¹, Jeffrey Holiday, Renee Janes

¹Department of Internal Medicine, Division of Cardiology, Michigan State University, Sparrow Health System, Thoracic and Cardiovascular Institute, Lansing, Michigan 48910, USA.

Pacing and Clinical Electrophysiology : PACE

|August 30, 2007

Summary

Hypotension during cardiac resynchronization therapy (CRT) implantation is a rare but serious complication. This study identifies patient factors and procedural events associated with severe hypotension during CRT procedures.

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Area of Science:

Cardiology
Medical Devices
Clinical Trials

Background:

Procedural hypotension during cardiac resynchronization therapy (CRT) implantation is an infrequent complication.
Limited data exists on the characteristics and contributing factors of this hemodynamic instability.

Observation:

A review of 105 CRT implantations identified four patients experiencing severe hypotension (systolic blood pressure <= 50 mmHg).
These patients commonly had hypertension, diabetes mellitus, pacemaker dependency, and reduced left ventricular ejection fraction (< or =20%).
Hypotension occurred during coronary sinus cannulation or left ventricular pacing.

Findings:

Severe hypotension during CRT implantation is associated with specific patient comorbidities and procedural stages.
Mechanisms of hemodynamic collapse, distinct from cardiac tamponade, require further investigation.

Implications:

Understanding these associations can help clinicians anticipate and potentially mitigate hypotension during CRT procedures.
Further research into the mechanisms of hypotension is warranted to improve patient safety during CRT implantation.