Related Experiment Videos
[New pathogenetic mechanisms of idiopathic dilated cardiomyopathy: changes in coronary microcirculation]
1Laboratorio PET Clinico, Istituto di Fisiologia Clinica, Consiglio Nazionale delle Ricerche, Pisa. dneglia@ifc.cnr.it
Insights
Coronary microvascular dysfunction is an early characteristic of dilated cardiomyopathy, potentially causing heart failure. Targeting coronary microcirculation may offer new treatment strategies for cardiac diseases.
Area of Science:
- Cardiology
- Vascular Biology
- Pathophysiology
Context:
- Growing evidence links coronary microvascular abnormalities to various cardiac diseases.
- Dilated cardiomyopathy (DCM) exhibits coronary microvascular dysfunction from its early stages.
- This dysfunction appears to be a cause, not just an effect, of myocardial damage.
Purpose:
- To highlight the role of coronary microvascular dysfunction in dilated cardiomyopathy.
- To explore the pathogenetic mechanisms and prognostic significance of this dysfunction.
- To propose coronary microcirculation as a therapeutic target in heart failure progression.
Summary:
- Coronary microvascular dysfunction is an early and integral feature of dilated cardiomyopathy.
- It contributes to progressive contractile dysfunction, ventricular dilatation, and heart failure, likely via hypoperfusion and ischemia.
- Severe dysfunction is an independent prognostic factor in DCM patients.
Impact:
- Establishes coronary microvascular dysfunction as a key pathogenetic mechanism in DCM.
- Suggests that the coronary microcirculation is a novel therapeutic target for preventing heart failure.
- Improves understanding of DCM progression and potential treatment avenues.
Abstract:
There is growing evidence of the presence and relevance of coronary microvascular abnormalities in many cardiac diseases. In particular, it has been recently shown that dilated cardiomyopathy is characterized by coronary microvascular dysfunction since its early onset. Abnormal coronary microcirculatory function is not an effect of myocardial damage but in turn seems to be able to cause progressive contractile dysfunction, ventricular dilatation and heart failure. The mechanisms are largely unknown but both myocardial hypoperfusion and myocardial ischaemia are most probably involved. It has been demonstrated that in patients with dilated cardiomyopathy the presence of severe coronary microcirculatory dysfunction is an independent and relevant prognostic factor. From these studies it is more and more evident that coronary microvascular dysfunction is a new pathogenetic mechanism in dilated cardiomyopathy and that the coronary microcirculation should be considered a new target of treatment in cardiac diseases at risk to evolve towards heart failure.