Related Experiment Videos
[Bronchial hyperresponsiveness in patients with vasospastic angina pectoris (VSAP)]
T Kageshita1, Y Nishimura, H Nakata
1Department of Respiratory Disease, Takatsuki General Hospital, Osaka, Japan.
Nihon Kyobu Shikkan Gakkai Zasshi
|February 18, 1998
Summary
Patients with vasospastic angina pectoris (VSAP) exhibit hyperresponsive airways and coronary arteries to cholinergic agonists. This suggests a systemic issue in VSAP, impacting both respiratory and cardiac functions.
Area of Science:
- Pulmonary Medicine
- Cardiology
- Pharmacology
Context:
- Vasospastic angina pectoris (VSAP) is characterized by coronary artery spasm.
- The relationship between coronary artery and airway spasmogenicity in VSAP patients is not fully understood.
- Assessing bronchial responsiveness provides insight into airway hyperreactivity.
Purpose:
- To investigate the correlation between airway and coronary artery spasmogenicity in patients with VSAP.
- To compare bronchial responsiveness in VSAP patients versus control subjects with normal coronary arteries.
Summary:
- Bronchial responsiveness to inhaled methacholine was measured in 21 VSAP patients and 17 controls.
- VSAP patients demonstrated significantly lower logarithmic minimum cumulative doses (Log Dmin) for decreased respiratory conductance compared to controls (0.47 vs. 0.98 log units, p < 0.05).
- Log Dmin in VSAP patients significantly correlated with the acetylcholine dose causing >90% coronary artery stenosis (r = 0.383, p < 0.05).
Impact:
- The findings indicate that both coronary arteries and airways exhibit hyperresponsiveness to cholinergic agonists in VSAP patients.
- This suggests a potential systemic predisposition to smooth muscle hyperreactivity in individuals with VSAP.
- Understanding this dual hyperresponsiveness may inform diagnostic and therapeutic strategies for VSAP.