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Titolo:
IMPORTANCE OF NON-STENOSED DONOR CORONARY-ARTERIES FOR COLLATERAL FLOW RESERVE
Autore:
EJIRI M; FUJITA M; MIWA K; NOZAWA T; ASANOI H; SASAYAMA S;
Indirizzi:
TOYAMA MED & PHARMACEUT UNIV,DEPT INTERNAL MED 2,2630 SUGITANI TOYAMATOYAMA 93001 JAPAN TOYAMA MED & PHARMACEUT UNIV,DEPT INTERNAL MED 2,2630 SUGITANI TOYAMATOYAMA 93001 JAPAN
Titolo Testata:
International journal of cardiology
fascicolo: 1, volume: 39, anno: 1993,
pagine: 5 - 11
SICI:
0167-5273(1993)39:1<5:IONDCF>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
CIRCULATION; OCCLUSION; ISCHEMIA;
Keywords:
CORONARY COLLATERAL CIRCULATION; RAPID ATRIAL PACING; STABLE EFFORT ANGINA; CONTRAST APPEARANCE TIME; COLLATERAL FLOW RESERVE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
M. Ejiri et al., "IMPORTANCE OF NON-STENOSED DONOR CORONARY-ARTERIES FOR COLLATERAL FLOW RESERVE", International journal of cardiology, 39(1), 1993, pp. 5-11

Abstract

To elucidate whether the presence of significant stenoses in donor coronary arteries compromises collateral flow reserve, coronary arteriography was performed in 22 patients with stable effort angina who had acomplete obstruction in one of the major coronary arteries. The patients were divided into two groups according to the absence (group I: n = 11) or presence (group II: n = 11) of significant stenoses (greater-than-or-equal-to 75% stenosis of the luminal diameter) in donor arteries. After conventional cardiac catheterization, coronary arteriographywas repeated before and during rapid atrial pacing. Coronary collateral circulation was evaluated by means of angiographic contrast appearance time (CAT) which was defined as the time (s) until the epicardial segments distal to the site of complete occlusion were opacified afterthe injection of contrast medium into the donor artery. The pressure gradient across the collateral circulation (mean aortic pressure minusleft ventricular end-diastolic pressure) remained unchanged before and during rapid atrial pacing (group I: 95 +/- 14 vs. 99 +/- 15 mmHg; group II: 91 +/- 18 vs. 94 +/- 16 mmHg). Rapid atrial pacing decreased the contrast appearance time in group I from 1.73 +/- 0.34 to 1.47 +/-0.37 s (P < 0.01), but was not changed in group II from 1.68 +/- 0.36to 1.73 +/- 0.51 s (P = n.s.). It was concluded that coronary collateral circulation is further augmented in response to an increase in myocardial oxygen demand in patients with non-stenosed donor coronary arteries and significant stenoses in donor arteries compromise an increase in collateral blood flow.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 08:35:10