Stroke and Embolic Events in Hypertrophic Cardiomyopathy: Risk Stratification in Patients Without Atrial Fibrillation.

Abstract:

BACKGROUND AND PURPOSE:Stroke and systemic embolic events are known to occur as complications of hypertrophic cardiomyopathy (HCM), and these complications are more common in patients with accompanying atrial fibrillation (AF). The diagnosis of AF is sometimes difficult, however, and it is possible that subclinical asymptomatic paroxysmal episodes or a first episode of AF in patients without previously documented AF may lead to embolic events. We investigated the prevalence of embolic events in patients with HCM and evaluated risk factors for these events in patients without documented AF. METHODS:This study enrolled 593 patients with clinically diagnosed HCM (age at diagnosis, 51.0±15.6 years) from 1980 to 2010. RESULTS:During a mean follow-up of 10.7±7.5 years, 68 (11.5%) experienced stroke and embolic events. AF had been documented before the event in 29 (42.6%) of them. AF was documented for the first time at the time of the event in 5 (7.4%) and after the event in 10 (14.7%). Among the 431 patients without previously documented AF (39 with events and 392 without events), older age at diagnosis and left atrial dimension ≥48 mm were identified as the independent determinants of the embolic event after adjusting for sex and classic prognostic markers related to HCM. CONCLUSIONS:The incidence of stroke and embolic events was about 1.0% per year in the HCM cohort. AF had not been previously documented before the event in more than half of patients with events. Older age and enlarged left atrial dimension are possible risk factors for embolic events in patients with HCM without documented AF.

journal_name

Stroke

journal_title

Stroke

authors

Haruki S,Minami Y,Hagiwara N

doi

10.1161/STROKEAHA.115.012130

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

936-42

issue

4

eissn

0039-2499

issn

1524-4628

pii

STROKEAHA.115.012130

journal_volume

47

pub_type

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