TY - JOUR
T1 - Strain rate imaging for assessment of regional myocardial function
T2 - Results from a clinical model of septal ablation
AU - Abraham, Theodore P.
AU - Nishimura, Rick A.
AU - Holmes, David R.
AU - Belohlavek, Marek
AU - Seward, James B.
PY - 2002/3/26
Y1 - 2002/3/26
N2 - Background - Regional myocardial function assessment is essential in the management of coronary artery disease (CAD). Tissue Doppler imaging (TDI) by depicting local myocardial motion can potentially quantify regional myocardial function. Strain rate imaging (SRI) that depicts regional deformation is less susceptible to cardiac translation and tethering and may be superior to TDI for regional function analysis. We examined regional myocardial function using TDI and SRI in a unique clinical model of a small, discrete myocardial infarction. Method and Results - Ten patients with severely symptomatic septal hypertrophy underwent basal septal ablation via intracoronary alcohol injection and had TDI and SRI pre- and postablation. Invasive hemodynamics showed no appreciable change in global function. Peak systolic strain rate was significantly lower postablation versus preablation (-0.5 versus -1.2 s-1, P<0.001) and when comparing infarct and noninfarct areas (-0.5 versus -1.5 s-1, P<0.001). In contrast, peak systolic tissue velocities were similar pre- and postablation (3.9 versus 2.9 cm/s, P=0.16) and between infarct and noninfarct areas (2.9 versus 2.2 cm/s, P=0.13). SRI analysis demonstrated reduced systolic function in the peri-infarct zone and preserved systolic function in the remote nonischemic zone. Conclusion - In the clinical setting of a small, discrete infarct unaccompanied by changes in global function, SRI accurately depicted changes in regional function. These data suggest that SRI may be the optimal method for objective, quantitative assessment of regional myocardial dysfunction.
AB - Background - Regional myocardial function assessment is essential in the management of coronary artery disease (CAD). Tissue Doppler imaging (TDI) by depicting local myocardial motion can potentially quantify regional myocardial function. Strain rate imaging (SRI) that depicts regional deformation is less susceptible to cardiac translation and tethering and may be superior to TDI for regional function analysis. We examined regional myocardial function using TDI and SRI in a unique clinical model of a small, discrete myocardial infarction. Method and Results - Ten patients with severely symptomatic septal hypertrophy underwent basal septal ablation via intracoronary alcohol injection and had TDI and SRI pre- and postablation. Invasive hemodynamics showed no appreciable change in global function. Peak systolic strain rate was significantly lower postablation versus preablation (-0.5 versus -1.2 s-1, P<0.001) and when comparing infarct and noninfarct areas (-0.5 versus -1.5 s-1, P<0.001). In contrast, peak systolic tissue velocities were similar pre- and postablation (3.9 versus 2.9 cm/s, P=0.16) and between infarct and noninfarct areas (2.9 versus 2.2 cm/s, P=0.13). SRI analysis demonstrated reduced systolic function in the peri-infarct zone and preserved systolic function in the remote nonischemic zone. Conclusion - In the clinical setting of a small, discrete infarct unaccompanied by changes in global function, SRI accurately depicted changes in regional function. These data suggest that SRI may be the optimal method for objective, quantitative assessment of regional myocardial dysfunction.
KW - Imaging
KW - Myocardium
KW - Tissue
UR - http://www.scopus.com/inward/record.url?scp=0037177165&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037177165&partnerID=8YFLogxK
U2 - 10.1161/01.CIR.0000013423.33806.77
DO - 10.1161/01.CIR.0000013423.33806.77
M3 - Article
C2 - 11914244
AN - SCOPUS:0037177165
SN - 0009-7322
VL - 105
SP - 1403
EP - 1406
JO - Circulation
JF - Circulation
IS - 12
ER -