Initial and delayed right ventricular /sup 201/Tl rest-imaging following dipyridamole-induced coronary vasodilation: relationship to right coronary artery pathoanatomy

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · Am. Heart J.; (United States)

DOI:https://doi.org/10.1016/0002-8703(82)90565-8· OSTI ID:6879850

Brown, K A; Boucher, C A; Okada, R D; Strauss, H W; Pohost, G

The relationship of coronary anatomy to right ventricular (RV) appearance on serial /sup 201/Tl myocardial imaging (TI) following dipyridamole (DP)-induced coronary vasodilation was examined in 71 consecutive patients undergoing coronary angiography for the evaluation of chest pain. Transient defects of the RV were found in 18 patients. All 18 had significant (greater than or equal to 50%) stenosis of the proximal right coronary artery (RCA). Nonvisualization of RV activity occurred in 13 patients. Six of these 13 (46%) had proximal RCA disease (p less than 0.05 compared to transient defects). Normal RV appearance was seen in 40 patients, of whom only six (15%) had proximal RCA disease (p less than 0.001 compared to transient defects). RV appearance was not affected by left anterior descending or left circumflex artery disease or by the /sup 201/Tl uptake in the left ventricle. Thus with serial (initial and delayed) TI following DP (1) transient RV defect appears to indicate significant proximal RCA disease; (2) normal RV appearance suggests the absence of proximal RCA disease; and (3) however, nonvisualization of the RV appears to be nondiagnostic.

• Research Organization: Cardiac Unit, Massachusetts General Hospital. Boston, MA
• OSTI ID: 6879850
• Journal Information: Am. Heart J.; (United States), Journal Name: Am. Heart J.; (United States) Vol. 103:6; ISSN AHJOA
• Country of Publication: United States
• Language: English

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