Mixed type multivessel spasm during provocation testing was significantly associated with major adverse cardiac events (adjusted HR 2.84; 95% CI 1.34-6.03; P<0.01).
Observational (n=1,244)
Yes
Are spasm provocation tests safe and does spasm type predict MACE in patients with vasospastic angina?
Spasm provocation tests have an acceptable safety profile, and identifying mixed-type multivessel spasm provides important prognostic information for predicting MACE in VSA patients.
Effect estimate: HR 2.84 (95% CI 1.34-6.03)
p-value: p=<0.01
AIMS: Provocation tests of coronary artery spasm are useful for the diagnosis of vasospastic angina (VSA). However, these tests are thought to have a potential risk of arrhythmic complications, including ventricular tachycardia (VT), ventricular fibrillation (VF), and brady-arrhythmias. We aimed to elucidate the safety and the clinical implications of the spasm provocation tests in the nationwide multicentre registry study by the Japanese Coronary Spasm Association. METHODS AND RESULTS: A total of 1244 VSA patients (M/F, 938/306; median 66 years) who underwent the spasm provocation tests were enrolled from 47 institutes. The primary endpoint was defined as major adverse cardiac events (MACEs). The provocation tests were performed with either acetylcholine (ACh, 57%) or ergonovine (40%). During the provocation tests, VT/VF and brady-arrhythmias developed at a rate of 3.2 and 2.7%, respectively. Overall incidence of arrhythmic complications was 6.8%, a comparable incidence of those during spontaneous angina attack (7.0%). Multivariable logistic regression analysis demonstrated that diffuse right coronary artery spasm (P < 0.01) and the use of ACh (P < 0.05) had a significant correlation with provocation-related VT/VF. During the median follow-up of 32 months, 69 patients (5.5%) reached the primary endpoint. The multivariable Cox proportional hazard model revealed that mixed (focal plus diffuse) type multivessel spasm had an important association with MACEs (adjusted hazard ratio, 2.84; 95% confidence interval, 1.34-6.03; P < 0.01), whereas provocation-related arrhythmias did not. CONCLUSION: The spasm provocation tests have an acceptable level of safety and the evaluation of spasm type may provide useful information for the risk prediction of VSA patients.
Takagi et al. (Tue,) conducted a observational in Vasospastic angina (VSA) (n=1,244). Spasm provocation tests (acetylcholine or ergonovine) was evaluated on Major adverse cardiac events (MACEs) (HR 2.84, 95% CI 1.34-6.03, p=<0.01). Mixed type multivessel spasm during provocation testing was significantly associated with major adverse cardiac events (adjusted HR 2.84; 95% CI 1.34-6.03; P<0.01).