Abstract Body (Do not enter title and authors here): Background: Diastolic dysfunction (DD) is associated with adverse cardiovascular outcomes including atrial fibrillation. Whether DD is independently associated with incident ischemic stroke/transient ischemic attack (TIA) and with bleeding events is not well established.
Aims: To examine the association of presence and severity of DD with the risk of incident ischemic stroke/TIA and major bleeding.
Methods: A total of 219,667 patients who underwent at least one echocardiogram between 2010 and 2022 at a large academic institution and were followed for at least 3 months were included. Patients with prior history of stroke or TIA (n=21,505, 10%) were excluded. Smart key-phrase search was applied to echocardiographic reports to classify patients into 4 groups, based on the most severe DD assessment: Normal (n=113,265), grade I (n=21,981), grade II (n=7,215), and grade III (n=1,627). Patients in whom the presence of DD could not be determined (n=54,074) were excluded. The final study cohort (n=144,088) was followed to the endpoint of hospital admission for ischemic stroke/TIA or for major bleeding.
Results: Over a median follow-up of 3.4 years, 3482 (2.4%) patients were hospitalized for stroke/TIA and 6994 (4.9%) for major bleeding. After adjusting for several confounding variables (Table), DD remained a strong predictor of incident stroke/TIA (hazard ratio (HR)=1.34 per grade increase in DD, p<0.001, Figure) and of major bleeding (HR=1.32 per grade increase in DD, p<0.001, Figure). These results were similar in patients with (n=11,508, 8%) or without prior history of atrial fibrillation.
Conclusions: Patients with DD have a heightened risk of ischemic cerebrovascular accidents and major bleeding independent of the presence of atrial fibrillation. These risks escalate with the severity of DD. DD should be considered when counseling patients regarding their risk profile and management options.