epicardial access
Percutaneous entry into the pericardial space to access the outer surface of the heart for mapping and ablation.
Full Definition
Epicardial access involves percutaneous entry into the pericardial space to reach the outer (epicardial) surface of the heart for electrophysiological mapping and ablation procedures. The technique typically uses a needle puncture through the subxiphoid approach under fluoroscopic guidance, allowing placement of catheters on the epicardial surface. This access is particularly important for ventricular arrhythmias originating from the epicardium and certain atrial arrhythmias that cannot be adequately treated from the endocardial approach alone.
Usage
Usage note: High-risk procedure requiring specialized expertise. Often abbreviated as 'epi access' in clinical notes.
In Context
- "Epicardial access was obtained safely via the subxiphoid approach for VT substrate mapping." — Epicardial VT ablation report
- "Combined endocardial and epicardial mapping revealed the arrhythmia origin on the epicardial surface." — Complex VT procedure note