Comparison of maximal elastance and systolic wall thickening using arterial tonometry and gated myocardial SPECT in patients undergoing coronary artery bypass grafting.
Myocardial SPECT using (99m)Tc-sestamibi, (99m)Tc-tetrofosmin, (201)Thallium is widely used in nuclear cardiology. Left ventricular systolic wall thickening (SWT) by SPECT and regional maximal elastance (rE(max)) using arterial tonometry were compared. rE(max) was calculated from time-pressure and time-volume curves. In normal heart, improvement of SWT was 4.1+/-11%, while 6.0+/-16% in dilated heart. Improvement of rE(max) was 0.67+/-1.0mmHg/mL in normal heart and 0.32+/-0.7mmHg/mL in dilated heart (p<0.05). rE(max) can be an alternative variable as an index of regional contractility.
Kang
Won Jun
WJ
Department of Radiology, Division of Nuclear Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea.
Lee
Dong Soo
DS
Lee
Byeong Il
BI
Paeng
Jin Chul
JC
Lee
Jae Sung
JS
Chung
June-Key
JK
Lee
Myung Chul
MC
D000368:Aged; D055426:Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography / Q000379:methods*; D002311:Cardiomyopathy, Dilated / Q000000981:diagnostic imaging / Q000473:pathology*; D016022:Case-Control Studies; D001026:Coronary Artery Bypass; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008297:Male; D008365:Manometry / Q000379:methods*; D008875:Middle Aged; D009200:Myocardial Contraction