Impact of Diltiazem Alone versus Diltiazem with Nitrate on Five-Year Clinical Outcomes in Patients with Significant Coronary Artery Spasm.
- Author:
Taeshik PARK
1
;
Ji Young PARK
;
Seung Woon RHA
;
Hong Seog SEO
;
Byoung Geol CHOI
;
Se Yeon CHOI
;
Jae Kyeong BYUN
;
Sang Ho PARK
;
Eun Jin PARK
;
Jah Yeon CHOI
;
Sung Hun PARK
;
Jae Joong LEE
;
Sunki LEE
;
Jin Oh NA
;
Cheol Ung CHOI
;
Hong Euy LIM
;
Jin Won KIM
;
Eung Ju KIM
;
Chang Gyu PARK
;
Dong Joo OH
Author Information
- Publication Type:Original Article
- Keywords: Diltiazem; nitrate; coronary vasospasm
- MeSH: Acetylcholine; Aged; Angina Pectoris/diagnosis; Calcium Channel Blockers/therapeutic use; Cardiovascular Agents/*therapeutic use; Coronary Angiography/adverse effects; Coronary Artery Disease/prevention & control; Coronary Vasospasm/diagnosis/*drug therapy; Diltiazem/*therapeutic use; Drug Therapy, Combination; Female; Humans; Incidence; Male; Middle Aged; Myocardial Infarction/prevention & control; Nitrates/*therapeutic use; Propensity Score; Time Factors; Vasodilator Agents/therapeutic use
- From:Yonsei Medical Journal 2017;58(1):90-98
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: Calcium channel blockers diltiazem and nitrate have been used as selective coronary vasodilators for patients with significant coronary artery spasm (CAS). However, no study has compared the efficacy of diltiazem alone versus diltiazem with nitrate for long-term clinical outcomes in patients with CAS. MATERIALS AND METHODS: A total of 2741 consecutive patients without significant coronary artery disease with positive CAS by acetylcholine (Ach) provocation test between November 2004 and May 2014 were enrolled. Significant CAS was defined as a narrowing of >70% by incremental intracoronary injection of 20, 50, and 100 µg of Ach into the left coronary artery. Patients were assigned to either the diltiazem group (n=842) or the dual group (diltiazem with nitrate, n=1899) at physician discretion. To adjust for potential confounders, a propensity score matching (PSM) analysis was performed using the logistic regression model. After PSM analysis, two well-balanced groups (811 pairs, n=1622, C-statistic=0.708) were generated. RESULTS: At 5 years, there were similar incidences in primary endpoints, including mortality, myocardial infarction, revascularization, and recurrent angina requiring repeat coronary angiography between the two groups. Diltiazem alone was not an independent predictor for major adverse cardiovascular events or recurrent angina requiring repeat coronary angiography. CONCLUSION: Despite the expected improvement of endothelial function and the relief of CAS, the combination of diltiazem and nitrate treatment was not superior to diltiazem alone in reducing mortality and cardiovascular events up to 5 years in patients with significant CAS.
