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Published on: October 28, 2020
The prevalence of treatable left ventricular systolic dysfunction in patients who present with noncardiac vascular
Robert Kelly1, Anthony Staines, Ron MacWalter
1Department of Clinical Pharmacology, University of Dundee and Medical School, Ninewells Hospital, Dundee, Scotland, United Kingdom.
Insights
Left ventricular systolic dysfunction (LVSD) is five times more common in patients with their first noncardiac vascular event than in controls. Screening for LVSD in these patients is recommended to potentially reduce cardiac death.
Area of Science:
- Cardiology
- Vascular Medicine
- Diagnostic Imaging
Background:
- Patients experiencing their first noncardiac vascular episode, such as stroke, TIA, or PVD, represent a critical window for identifying underlying cardiac conditions.
- Undiagnosed left ventricular systolic dysfunction (LVSD) is a significant contributor to sudden cardiac death in these patient populations.
- Early detection of LVSD may offer opportunities for intervention to mitigate cardiovascular risk.
Purpose of the Study:
- To determine the prevalence of treatable left ventricular systolic dysfunction (LVSD) in patients presenting with their first noncardiac vascular episode.
- To compare the incidence of LVSD in patients with vascular disease versus age- and gender-matched control subjects.
- To inform clinical practice regarding the potential benefits of screening for LVSD in this cohort.
Main Methods:
- A cohort of 522 patients (302 with stroke, TIA, or PVD; 220 controls) underwent clinical assessment, ECG, and echocardiography.
- Left ventricular systolic dysfunction (LVSD) was defined by an LV ejection fraction less than or equal to 40%.
- Statistical analysis compared the prevalence of LVSD between patient groups and controls.
Main Results:
- LVSD was detected in 28% of patients with vascular disease compared to 5.5% of control subjects.
- Prevalence of LVSD was 28% in stroke patients, 26% in TIA patients, and 31% in PVD patients.
- Asymptomatic LVSD was more common than symptomatic LVSD in patients with vascular disease.
Conclusions:
- Left ventricular systolic dysfunction is significantly more prevalent in patients with first-time noncardiac vascular episodes.
- The high prevalence of both symptomatic and asymptomatic LVSD underscores the need for systematic screening.
- Routine screening for LVSD in patients with noncardiac vascular events should be considered to potentially reduce cardiac mortality.
Objectives:
We sought to determine the prevalence of treatable left ventricular (LV) systolic dysfunction (LVSD) in patients who present with their first noncardiac vascular episode.
Background:
Screening for LV dysfunction in patients who present with their first stroke (cerebrovascular accident), their first transient ischemic attack (TIA) or their first manifestation of peripheral vascular disease (PVD) may represent a golden opportunity to identify treatable LV dysfunction, and so their known high incidence of sudden cardiac death may be reduced.
Methods:
Participating in this study were 522 (75%) of 700 consecutive patients (302 patients with stroke, TIA or PVD and 220 age- and gender-matched control subjects). Each underwent a full clinical assessment, 12-lead electrocardiography and two-dimensional echocardiography. Left ventricular dysfunction was defined as LV ejection fraction < or = 40%.
Results:
Seventy-two (28%) patients with vascular disease and 11 (5.5%) control subjects were found to have LVSD. Twenty-six (28%) stroke patients, 22 (26%) patients with TIA and 24 (31%) patients with PVD had LVSD. Left ventricular systolic dysfunction was symptomatic in 44% of patients and in 35% of control subjects.
Conclusions:
Left ventricular systolic dysfunction is five times more common among patients with stroke, TIA and PVD than among age- and gender-matched control subjects. Asymptomatic LVSD is more common than symptomatic LVSD in these patients. These findings suggest that routine screening of all patients with noncardiac vascular episodes for LVSD should now be considered. Future studies should investigate whether identifying and treating LVSD in these patients would reduce their known high rate of cardiac death.
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