Disfunzione ventricolare destra nell'ischemia da aumentata domanda in pazienti con lesione isolata della coronaria destra: uno studio radiosotopico.

Translated title of the contribution: Right ventricular dysfunction in demand-induced ischemia in patients with isolated right coronary artery disease: a radioisotope study

C. Marcassa, O. Parodi, P. Marzullo, G. Sambuceti, D. Neglia, A. Fontana

Research output: Contribution to journalArticle

Abstract

In ischemic heart disease, the left ventricle has been considered the main target of an imbalance between myocardial oxygen supply and demand. Accordingly, the approach to ischemia has been directed at the evaluation of the left ventricle. The aim of this study was to assess the relative involvement of the left and right ventricle in patients with isolated right coronary artery stenosis. We studied 20 patients with a clinical history of effort angina (15 male, 5 female, mean age 54.1 +/- 6.2) using radionuclide angiography and atrial pacing. Findings were compared with those of 6 normal subjects that were paced at the maximal heart rate of 150 beats/min. Atrial pacing was interrupted because of diagnostic ST segment depression in 8 patients, Wenckebach type atrioventricular block in 1, chest pain without electrocardiographic changes in 4 and the achievement of the maximal prefixed heart rate of 150 beats/minute in 7. With respect to control conditions, during atrial pacing right ventricular ejection fraction declined from 46.8 +/- 6.8% to 37.4 +/- 8.1% (p less than 0.001), while no significant change was observed in left ventricular ejection fraction values (55.2 +/- 4.5% and 51.1 +/- 10.2% respectively). During atrial pacing, left ventricular peak filling rate increased from 1.77 +/- 0.53 to 4.71 +/- 1.8 end-diastolic volumes/second (p less than 0.0001). Qualitative analysis of regional wall motion showed a right ventricular dysfunction in 19/20 patients; this was prevalent in 9 and involving also the left ventricle in 10; an isolated impairment of the left ventricle was observed in 1 patient.(ABSTRACT TRUNCATED AT 250 WORDS)

Translated title of the contributionRight ventricular dysfunction in demand-induced ischemia in patients with isolated right coronary artery disease: a radioisotope study
Original languageItalian
Pages (from-to)1005-1012
Number of pages8
JournalGiornale Italiano di Cardiologia
Volume18
Issue number12
Publication statusPublished - Dec 1988

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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