Abstract
Background: Previous studies have reported that carotid sinus massage responses are associated with advancing age and carotid or coronary artery disease.
Hypothesis: This study was undertaken to investigate the potential role of carotid sinus hypersensitivity as a marker for the presence of coronary artery disease, and especially left main stem disease, in patients who were referred for evaluation of chest pain.
Methods: Toward this end, carotid sinus stimulation with simultaneous recordings of the electrocardiogram and aortic pressure was performed before coronary arteriography in 150 selected consecutive patients (mean age 59.4 ± 9 years) who were referred for evaluation of chest pain.
Results: Coronary artery disease was present in 118 patients (78.7%); of these, 35 had single‐vessel disease, 35 had double‐vessel disease, 33 had triple‐vessel disease, and 15 had left main stem with or without such vessel disease. Carotid sinus hypersensitivity was found in 40 patients (26.6%). The incidence of hypersensitivity in patients with single‐, double‐, or triple‐vessel disease and left main stem disease was 8.5, 14.2, 57.5, and 73.3%, respectively. Stepwise multiple logistic regression analysis revealed that left main stem disease was significantly and independently related to the presence of carotid sinus hypersensitivity (p < 0.05). In addition, the presence of hypersensitivity had 73.3% sensitivity, 86.2% specificity, and 96.3% negative predictive value for the presence of left main stem disease.
Conclusion: In patients being evaluated for suspected ischemic heart disease, carotid sinus massage responses are related to severe coronary disease. The absence of hypersensitivity may reflect absence of left main stem disease.
Keywords: carotid sinus hypersensitivity, left main stem coronary artery disease
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