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Coronary Microcirculation in Heart Failure with Preserved Systolic Function
Zorana Vasiljevic1, Gordana Krljanac1,2, Marija Zdravkovic1,3
1University of Belgrade, Faculty of Medicine, Belgrade, Serbia.
Insights
Heart Failure with Preserved Ejection Fraction (HFpEF) involves coronary microcirculation issues. Diagnostic tools like echocardiography and CMR imaging are key, but understanding and treating HFpEF remains challenging.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Heart Failure with Preserved Ejection Fraction (HFpEF) is characterized by preserved left ventricular ejection fraction (LVEF) alongside heart failure symptoms.
- HFpEF shares similar mortality and hospital readmission rates with Heart Failure with Reduced Ejection Fraction (HFrEF).
- Coronary microvascular ischemia, cardiomyocyte injury, and stiffness are implicated in HFpEF pathophysiology.
Purpose of the Study:
- To analyze the relationship between HFpEF and coronary microcirculation based on existing studies.
Main Methods:
- Review of previous studies examining HFpEF and coronary microcirculation.
- Evaluation of diagnostic markers including transthoracic echocardiography (TTE), coronary flow reserve (CFR), fractional flow reserve (FFR), and quantitative myocardial contrast echocardiography (MCE).
- Consideration of cardiac magnetic resonance (CMR) imaging as a diagnostic gold standard.
Main Results:
- TTE parameters, CFR, FFR, and MCE show potential as diagnostic markers for coronary microcirculation in HFpEF.
- Cardiac magnetic resonance (CMR) imaging is identified as the gold standard for HFpEF diagnosis.
- Coronary microvascular dysfunction, particularly in women without obstructive coronary artery disease, is poorly understood. Troponin levels may aid in risk stratification.
Conclusions:
- Pathophysiological mechanisms of HFpEF, especially coronary microvascular dysfunction, require further elucidation.
- Precise clinical assessments and diagnostic methods for coronary microvascular and diastolic dysfunction in HFpEF are lacking.
- There is currently no well-established treatment for HFpEF.
Background:
The Heart Failure with Preserved Ejection Fraction (HFpEF) is defined as the preserved left ventricular ejection fraction (LVEF) with the signs of heart failure, elevated natriuretic peptides, and either the evidence of the structural heart disease or diastolic dysfunction. The importance of this form of heart failure was increased after studies where the mortality rates and readmission to the hospital were founded similar as in patients with HF and reduced EF (HFrEF). Coronary microvascular ischemia, cardiomyocyte injury and stiffness could be important factors in the pathophysiology of HFpEF.
Methods:
The goal of this work is to analyse the relationship of HFpEF and coronary microcirculation in previous studies.
Results:
The useful diagnostic marker of coronary microcirculation in HFpEF may be the parameters measured by transthoracic echocardiography (TTE), the coronary flow reserve (CFR), as well as fractional flow reserve (FFR) and quantitative myocardial contrast echocardiography (MCE). Cardiac magnetic resonance (CMR) imaging represents the diagnostic gold standard in HFpEF. Coronary microvascular dysfunction in the absence of obstructive coronary artery disease (CAD) is poorly understood and may be more prevalent amongst women than men. Troponin level may be important in risk stratification of HEpEF patients.
Conclusion:
There are no precise answers with respect to the pathophysiological mechanism, nor are there any precise practical clinical assessment of and diagnostic method for coronary microvascular dysfunction and diastolic dysfunction. In accordance with that, there is no well-established treatment for HFpEF.
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