Pulmonary Venous Waveforms Predict Rehospitalization and Mortality After Percutaneous Mitral Valve Repair

Area of Science:

• Cardiology
• Interventional Cardiology
• Echocardiography

Background:

• Hemodynamic changes during percutaneous mitral valve repair (PMVR) with MitraClip are not fully understood.
• MitraClip is a device used for treating mitral regurgitation (MR).

Purpose of the Study:

• To investigate if intraprocedural improvement of pulmonary venous (PV) waveforms after PMVR predicts patient outcomes.
• To analyze the correlation between hemodynamic changes and rehospitalization/mortality post-PMVR.

Main Methods:

• Retrospective review of 115 patients undergoing PMVR for MR.
• Assessment of intraprocedural transesophageal echocardiograms, including PV waveforms, MR grade, and invasive hemodynamics (LAP, V-wave).
• Comparison of procedural data with 30-day and 1-year rehospitalization and mortality rates.

Main Results:

• 73% of analyzed cases showed improved PV waveforms post-MitraClip.
• Patients with PV waveform improvement had significantly better 24-month survival (85% vs. 40%) and reduced 1-year cardiac rehospitalization (OR: 0.18).
• Intraprocedural MR grade and invasive hemodynamics did not consistently predict outcomes.

Conclusions:

• Intraprocedural pulmonary venous waveforms are significant predictors of procedural success in PMVR.
• PV waveform morphology improvement post-MitraClip is associated with reduced mortality and rehospitalization.
• Further multicenter studies are warranted to confirm these findings.