Tkivni Doppler i strain rate ehokardiografija u proceni regionalne miokardne funkcije

Abstract

Introduction Doppler monitoring of small tissue velocity, can quantify with solid reliability the movement of healthy and diseased myocardium. Strain rate imaging also reflects the tension and degree of myocardial deformation so it can be used as a noninvasive technique to quantify with greater accuracy than tissue Doppler. Objective was to compare the features of tissue Doppler and strain rate imaging in detecting postinfarct changes and assess the sensitivity of each method individually. Methods The study included 35 patients with infarct scar, average age 58.1±10.9 years. All subjects was carried out in addition to conventional ultrasound and tissue Doppler imaging and strain rate on the device Esaote My Lab 30 CV - strain X software package. The evaluation was eprformed in the zone of the scar and the opposite wall of the heart were recorded with a maximum systolic tissue Doppler velocity and the maximum strain / strain in systolic rate. Results The results of tissue Doppler for a myocardial infarction scar was 0.08±0.01 m/sec, while the opposite wall of 0.09±0.02 m/sec (p <0.05). Systolic strain in a myocardial infarction scar area was 16.7±3.9%, while in the area of the opposite wall 18.8±4.0% (p<0.01). Strain rate for the the zone is a heart scar was -0.8±0.21 1/sec, while in the area of the opposite wall of -1.1±0.25 1/sec (p<0.01). ConclusionTissue Doppler and strain rate can reliably detect the difference of healthy myocardium and scared tissue, with high sensitivity in favor of the strain rate method.