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Coronary Sinus Reduction for the Treatment of Refractory Angina: What Have We Learned after 70 Years of the Beck
Sara Del Vecchio Ziotti1, Luciana Oliveira Cascaes Dourado1, Ranil de Silva2,3
1Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP - Brasil.
Insights
Coronary sinus reduction is a promising therapy for refractory angina, especially for patients unsuitable for revascularization. This minimally invasive procedure offers new hope for managing chronic coronary syndromes and myocardial ischemia.
Area of Science:
- Cardiology
- Vascular Surgery
- Interventional Cardiology
Background:
- Chronic coronary syndromes and refractory angina affect many patients, often those unsuitable for traditional revascularization.
- The coronary venous sinus has been explored for anti-ischemic therapies since the 1950s.
- Recent advancements enable minimally invasive approaches for myocardial blood flow assessment and treatment.
Purpose of the Study:
- To review the pathophysiology and historical context of angina pectoris and myocardial ischemia.
- To examine coronary sinus reduction as a therapeutic option for refractory angina.
- To explore scientific evidence, identify research gaps, and suggest future directions for coronary sinus reduction.
Main Methods:
- Review of historical and recent scientific literature on coronary sinus interventions.
- Analysis of pathophysiological mechanisms underlying angina and ischemia.
- Evaluation of technical aspects and clinical outcomes of coronary sinus reduction.
Main Results:
- Coronary sinus reduction has evolved significantly due to technological progress.
- It presents a viable option for patients with refractory angina and potential benefits for microvascular dysfunction.
- Evidence from recent decades supports its role in managing ischemic heart conditions.
Conclusions:
- Coronary sinus reduction is an emerging, promising therapy for refractory angina.
- Further research is needed to fully elucidate its potential and optimize its application.
- This minimally invasive approach offers a new avenue for patients with limited treatment options.
Abstract:
With the increasing prevalence of chronic coronary syndromes, many patients with extensive atherosclerosis experience uncontrolled angina, even while receiving optimal medical therapy. This is especially true for patients who are not suitable candidates for surgical or percutaneous revascularization. Numerous treatments have been investigated for managing angina pectoris, and in this context, the coronary sinus reducer has emerged as a promising therapeutic option. Since the 1950s, beginning with Beck's surgery, the coronary venous sinus has been a focal point of research in anti-ischemic therapies. Significant scientific advances have been made in narrowing the venous sinus in the past two decades. Thanks to technological improvements in minimally invasive procedures and better methods for assessing myocardial blood flow, a new therapeutic option has become available for patients suffering from refractory angina and, possibly, for microvascular dysfunction. In this review, we aim to examine key concepts related to angina pectoris and myocardial ischemia, highlighting the historical background, pathophysiological rationale, and technical aspects of coronary sinus reduction as a therapy for refractory angina. Additionally, we will explore the scientific evidence from recent decades, as well as identify existing gaps and outline future research directions concerning this emerging treatment.
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