Use of an intracoronary Doppler guidewire for evaluation of coronary hemodynamics in the porcine model of acute hibernating myocardium during dobutamine stress tests

Abstract

ΔAPV may reflect the number of hibernating segments. The relative imbalance between blood supply and oxygen consumption in regional myocardium may be one of the mechanisms by which DSE detects AHM.

The detection of viable myocardium by low‐dose dobutamine stress speckle tracking echocardiography in patients with old myocardial infarction

“…As described for the first time by Heimdal et al, during myocardial contraction, as the wall shortens, it also thickens, which is used for assessment of contractile function, with radial thickening (positive strain), circumferential shortening (negative strain), and longitudinal shortening (negative strain). At low doses, dobutamine enhances myocardial blood flow in the region served by the narrowed coronary arteries and then enhances myocardial contractility and improves segmental wall motion …”

“…At low doses, dobutamine enhances myocardial blood flow in the region served by the narrowed coronary arteries and then enhances myocardial contractility and improves segmental wall motion. 17 Studies have demonstrated that STE-based S and Sr from the short axis and long axis of LV myocardial deformation can assess VM in patients with ischemic heart disease. 18,19 In our study, STE-based S and Sr at LDDSE had a higher accuracy than semi-quantitative wall-motion analysis combined with LDDSE for the assessment of VM.…”