Related Experiment Videos
Intact systolic left ventricular function in clinical congestive heart failure
Insights
Many congestive heart failure patients have normal systolic function but abnormal diastolic function. Identifying diastolic dysfunction is key for effective congestive heart failure treatment strategies.
Area of Science:
- Cardiology
- Heart Failure Research
Background:
- Clinical congestive heart failure (CHF) is often linked to left ventricular (LV) systolic dysfunction.
- However, a significant portion of CHF patients may present with preserved systolic function.
Purpose of the Study:
- To investigate the prevalence and characteristics of CHF in patients with intact systolic function.
- To identify the underlying mechanisms of CHF in this patient group.
Main Methods:
- Retrospective analysis of 58 CHF patients with preserved LV ejection fraction (EF) over one year.
- Utilized a clinical-radiographic CHF score and radionuclide evaluation of peak filling rate (PFR).
Main Results:
- 42% of clinically diagnosed CHF patients referred to nuclear cardiology had intact systolic function.
- 38% of these patients exhibited significant diastolic dysfunction (PFR < 2.50 EDV/s).
- An additional 24% showed probable diastolic dysfunction (PFR 2.5-3.0 EDV/s).
- Coronary artery disease and systemic hypertension were common comorbidities.
Conclusions:
- Intact systolic function is not uncommon in clinical congestive heart failure.
- Abnormal diastolic function is a frequent cause of CHF, even with preserved systolic function.
- Differentiating systolic and diastolic dysfunction is crucial for optimal CHF therapeutic strategies.
Abstract:
Clinical congestive heart failure (CHF) is traditionally associated wtih significant left ventricular (LV) systolic dysfunction. Over a 1-year period, 58 patients with CHF and intact systolic function (LV ejection fraction [EF] 62 +/- 11%) were identified. An objective clinical-radiographic CHF score was used to document the clinical impression. Based on radionuclide evaluation of peak filling rate, 38% of these patients were found to have a significant abnormality in diastolic function as measured by peak filling rate (less than 2.50 end-diastolic volume/s). An additional 24% of the patients had probable diastolic dysfunction with borderline abnormal peak filling rate measurements (2.5 to 3.0 end-diastolic volume/s). The disease states most frequently associated with CHF and intact systolic function were coronary artery disease and systemic hypertension. During a 3-month sampling period 42% of patients with clinical diagnosis of CHF referred to the nuclear cardiology laboratory were found to have intact systolic function; thus, intact systolic function is not uncommon in patients with clinical CHF. Abnormal diastolic function is the most frequently encountered mechanism for the occurrence of CHF. Definition of systolic and diastolic function appears relevant for development of optimal therapeutic strategies for the treatment of patients with CHF.