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Circulating immunoreactive endothelin in patients undergoing percutaneous transluminal coronary angioplasty
1First Department of Internal Medicine, Osaka City University Medical School, Japan.
Insights
Percutaneous transluminal coronary angioplasty (PTCA) significantly increased circulating endothelin (ir-ET) in the coronary sinus, suggesting a link to coronary endothelial injury. Femoral artery levels showed a non-significant trend of increase.
Area of Science:
- Cardiovascular Biology
- Endothelial Function
- Interventional Cardiology
Background:
- Endothelin (ET) is a potent vasoconstrictor peptide with implications in cardiovascular disease.
- Percutaneous transluminal coronary angioplasty (PTCA) is a common procedure to treat coronary artery stenosis.
- Understanding the impact of PTCA on vasoactive substances is crucial for patient outcomes.
Purpose of the Study:
- To investigate the changes in circulating immunoreactive endothelin (ir-ET) levels in the coronary sinus (CS) and femoral artery (Ao) following PTCA.
- To explore the potential association between ir-ET elevation and coronary endothelial injury induced by PTCA.
Main Methods:
- Measurement of plasma ir-ET levels in the CS and Ao of patients before and after PTCA.
- Analysis of the relationship between ir-ET levels and other physiological parameters (mean blood pressure, heart rate) and biochemical markers (thromboglobulin, thrombin-antithrombin complex).
Main Results:
- A statistically significant increase in plasma ir-ET levels was observed in the CS post-PTCA (from 1.6 +/- 0.8 pg/mL to 2.0 +/- 1.0 pg/mL, P < .05).
- Plasma ir-ET levels in the Ao showed a non-significant increasing trend after PTCA.
- No significant correlation was found between CS ir-ET levels and plasma thromboglobulin, thrombin-antithrombin complex, mean blood pressure, or heart rate.
Conclusions:
- The significant rise in coronary sinus ir-ET following PTCA suggests that this peptide may be released in response to endothelial injury caused by the procedure.
- These findings highlight a potential role for endothelin in the acute phase response to coronary angioplasty.
Abstract:
Circulating immunoreactive endothelin (ir-ET) in the coronary sinus (CS) and the femoral artery (Ao) was measured in patients who underwent percutaneous transluminal coronary angioplasty (PTCA). Plasma ir-ET level in the CS was significantly increased from 1.6 +/- 0.8 pg/mL to 2.0 +/- 1.0 pg/mL after PTCA (P less than .05). Plasma ir-ET level in the Ao tended to increase after PTCA, but it was not significant. Plasma ir-ET level in the CS was not related to the plasma thromboglobulin level, plasma thrombin-antithrombin complex level, mean blood pressure, or heart rate. These results suggest that the increase of plasma ir-ET level in the CS may be associated with the coronary endothelial injury by PTCA.