Effect of revascularizing viable myocardium on left ventricular diastolic function in patients with ischaemic...

Area of Science:

• Cardiology
• Cardiovascular Medicine
• Heart Failure Research

Background:

• Ischaemic left ventricular (LV) dysfunction with viable myocardium typically improves systolic function after revascularization.
• Diastolic dysfunction is common in these patients, but its response to revascularization remains unclear.

Purpose of the Study:

• To investigate the impact of revascularization on diastolic function in patients with chronic ischaemic cardiomyopathy and viable myocardium.
• To determine factors associated with improvements in diastolic function post-revascularization.

Main Methods:

• Echocardiography was used to assess systolic function (ejection fraction, wall motion score index) and diastolic function (transmitral Doppler, tissue Doppler imaging) in 26 patients.
• Patients were evaluated at baseline and at least 4 months after revascularization.

Main Results:

• Revascularization led to significant improvements in systolic function (EF increased, WMSI decreased).
• Diastolic filling patterns improved, with a reduction in restrictive filling and improved E' velocity and E/E' ratio.
• Decreased LV filling pressure was observed post-revascularization.

Conclusions:

• Revascularization can substantially improve LV diastolic filling in patients with ischaemic cardiomyopathy.
• The degree of diastolic function improvement correlates with myocardial viability and LV reverse remodeling, highlighting an added benefit of revascularization for viable but dysfunctional myocardium.