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Titolo:
Comparison of ischemic patterns in myocardial bridge and syndrome X: Evaluation by dobutamine stress echocardiography and stress thallium-201 SPECT
Autore:
Ho, YL; Wu, CC; Yen, RF; Hung, SR; Chen, MF; Huang, PJ;
Indirizzi:
Natl Taiwan Univ Hosp, Dept Internal Med Cardiol, Taipei, Taiwan Natl Taiwan Univ Hosp Taipei Taiwan nternal Med Cardiol, Taipei, Taiwan Natl Taiwan Univ Hosp, Dept Nucl Med, Taipei, Taiwan Natl Taiwan Univ Hosp Taipei Taiwan Hosp, Dept Nucl Med, Taipei, Taiwan Natl Taiwan Univ Hosp, Dept Nucl Med, Taipei, Taiwan Natl Taiwan Univ Hosp Taipei Taiwan Hosp, Dept Nucl Med, Taipei, Taiwan
Titolo Testata:
JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION
fascicolo: 2, volume: 100, anno: 2001,
pagine: 83 - 88
SICI:
0929-6646(200102)100:2<83:COIPIM>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
EMISSION COMPUTED-TOMOGRAPHY; CORONARY-ARTERY DISEASE; LEFT-VENTRICULAR HYPERTROPHY; CHEST PAIN; INFARCTION; ATHEROSCLEROSIS; DYSFUNCTION; MILKING; SCANS;
Keywords:
syndrome X; myocardial bridge; dobutamine stress echocardiography; stress thallium-201 SPECT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Huang, PJ Natl Taiwan Univ Hosp, Dept Internal Med Cardiol, 7 Chung-Shan SRd, Taipei, Taiwan Natl Taiwan Univ Hosp 7 Chung-Shan S Rd Taipei Taiwan, Taiwan
Citazione:
Y.L. Ho et al., "Comparison of ischemic patterns in myocardial bridge and syndrome X: Evaluation by dobutamine stress echocardiography and stress thallium-201 SPECT", J FORMOS ME, 100(2), 2001, pp. 83-88

Abstract

Background and purpose: Ischemic patterns in patients with syndrome X are thought to differ from those in patients with myocardial bridge, because the mechanisms of coronary flow reduction in these two diseases are different. The aim of this study was to compare the ischemic patterns in patients with syndrome X and those with myocardial bridge through the use of dobutamine stress echocardiography (DSE) and stress thallium-201 single-photon emission computed tomography (SPECT). Methods: Twenty-six patients with typical angina and stress-induced ST-segment depression were enrolled. All patients underwent coronary angiography,DSE, stress thallium-201 SPECT within 7 days after enrollment. Results: Of the 26 patients enrolled, 10 had myocardial bridge of the leftanterior descending artery and 16 had syndrome X. Among patients with myocardial bridge, myocardial dyssynergy was found by DSE in five patients and reversible or fixed thallium-201 perfusion defects were found in four. Seven patients with myocardial bridge had reverse redistribution patterns on thallium-201 scintigraphy. In the 16 patients with syndrome X, myocardial dyssynergy was found by DSE in only one patient (p = 0.018 vs myocardial bridge group) and reversible or fixed thallium-201 perfusion defects were found in nine (p > 0.05 vs myocardial bridge group). Four patients with syndrome X had reverse redistribution patterns on thallium-201 scintigraphy. The resting left ventricular end-diastolic pressure was higher in patients with myocardial bridge than in those with syndrorne X (17 +/- 4 vs 12 +/- 5 mm Hg,p = 0.02). Conclusions: The most common ischemic patterns in patients with syndrome Xwere chest pain and stress-induced ST-segment depression, followed by myocardial perfusion defects. Dobutamine-induced dyssynergy was rare. Left ventricular end diastolic pressure elevation and dobutamine-induced wall motionabnormalities were more common in patients with myocardial bridge than in those with syndrome X.

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Documento generato il 17/09/19 alle ore 23:29:25