Prognostic importance of mitral e' velocity in constrictive pericarditis

Area of Science:

• Cardiology
• Echocardiography
• Cardiac Surgery

Background:

• Medial mitral annulus early diastolic velocity (e") is a key echocardiographic marker in constrictive pericarditis (CP).
• Mitral e" velocity also reflects underlying myocardial disease, impacting patient prognosis.
• Pericardiectomy is a surgical intervention for advanced CP.

Purpose of the Study:

• To evaluate the prognostic significance of mitral e" velocity for long-term mortality in CP patients post-pericardiectomy.
• To determine the association between echocardiographic parameters and survival outcomes after CP surgery.

Main Methods:

• A cohort of 104 surgically confirmed CP patients underwent echocardiography and cardiac catheterization.
• Patients were categorized into primary CP and mixed CP groups based on myocardial disease presence.
• Multivariable analysis identified predictors of long-term mortality, including medial e" velocity and pulmonary artery pressure.

Main Results:

• Medial e" velocity and mean pulmonary artery pressure were independent predictors of long-term mortality post-pericardiectomy.
• Survival rates differed significantly based on cut-off values for medial e" (9.0 cm/s) and mean pulmonary artery pressure (29 mmHg).
• A paradoxical relationship was observed between E/e" ratio and pulmonary artery wedge pressure (PAWP), with no direct correlation.

Conclusions:

• Increased mitral e" velocity is associated with better long-term outcomes in patients with CP.
• The findings suggest that medial e" velocity is a valuable prognostic marker for CP patients undergoing pericardiectomy.
• A unique distribution of E/e" and PAWP exists in CP patients, highlighting complex cardiac dynamics.