Assessment of myocardial viability by myocardial contrast echocardiography: current perspectives.

PURPOSE OF REVIEW

The current guidelines recommend the use of myocardial contrast echocardiography (MCE) to assess myocardial viability. There are two clinical scenarios where detection of myocardial viability has clinical significance: in ischemic cardiomyopathy and following acute myocardial infarction with significant left ventricular dysfunction. Myocardial contrast echocardiography (MCE), which utilizes microbubbles can assess the integrity of the microvasculature, which sustains myocardial viability in real time and can hence rapidly provide information on myocardial viability at the bedside without ionizing radiation.

RECENT FINDINGS

We discuss the value of MCE to predict myocardial viability through the detection of the integrity of myocardial microvasculature, the newer evidences behind the MCE-derived coronary flow reserve and use of MCE postmyocardial infarction to detect no-reflow. Newer studies have also demonstrated the comparable sensitivities and specificities of MCE to single photon-emission computed tomography (SPECT), cardiac myocardial resonance imaging and PET for the detection of myocardial viability.

SUMMARY

Ample evidence now exist that supports the routine use of MCE for the detection of viability as laid down in recent guidelines.