Prevalence and predictors of atrial fibrillation in patients with embolic stroke of undetermined source: a real-life single-center retrospective study.

INTRODUCTION: Up to one-third of ischemic strokes remained cryptogenic despite extensive investigations. Atrial fibrillation may be detected in a significant proportion of patients with embolic stroke of undetermined source, particularly after the introduction of implantable loop recorder in clinical practice. METHODS: We retrospectively included all the consecutive patients with embolic stroke of undetermined source referred to our units in the period November 2013 to December 2018 and in which an implantable loop recorder was positioned within 6 months from stroke event. Prevalence and predictors of atrial fibrillation were investigated. RESULTS: One hundred thirty-eight patients with embolic stroke of undetermined source fulfilling inclusion criteria were identified. The crude prevalence of atrial fibrillation at the end of observation period was of 45.7%. Incidence rates at 6, 12, 18, 24, and 36 months resulted, respectively, 31.8% (95% CI, 30.4-46.7), 38.0% (95% CI, 30.4-46.9), 42.6% (95% CI, 34.5-51.6), 46.6% (95% CI, 38.2-55.8), and 50.4% (95% CI, 41.6-59.9). On multivariate analysis, only excessive supraventricular electric activity and left atrial enlargement resulted to be significant predictors of atrial fibrillation (p = 0.037 and p < 0.0001, respectively). CONCLUSIONS: Atrial fibrillation may be detected in a relevant proportion (up to 50%) of patients with embolic stroke of undetermined source if a careful and extensive diagnostic work-up is employed. Excessive supraventricular electric activity and left atrial enlargement are significant predictors of the occurrence of atrial fibrillation in these patients.

Reliability of the modified Rankin Scale applied by telephone.

We aimed to evaluate the reliability of the modified Rankin Scale applied telephonically compared with face-to-face assessment in clinically stable hospitalized patients with acute stroke. One hundred and thirty-one patients were interviewed twice by 2 certified nurses (unstructured interview). Half of the patients were randomized to be interviewed by telephone followed by the face-to-face assessment, and half in the reverse order. The median value of the modified Rankin Scale score was 4 (first to third interquartile range 3-5) by telephone as well as by face-to-face assessment (P=0.8). The weighted kappa between the two methods was 0.82 (95% confidence interval: 0.77-0.88). Sensitivity of the telephone assessment was lower for scores 2 and 3 (17% and 46%, respectively) than for the other scores (range 67-90%). Telephone assessment of stroke disability with the modified Rankin Scale is reliable in comparison to direct face-to-face assessment.

Validity and reliability of the Barthel index administered by telephone.

BACKGROUND AND PURPOSE: We aimed to evaluate validity and reliability of the Barthel Index administered telephonically compared with face-to-face assessment in clinically stable patients with stroke. METHODS: One hundred thirty-one patients were interviewed twice by 2 registered nurses with identical training. Half of the patients were randomized to receive the telephone interview followed by the face-to-face interview and half the contrary. The sequence of interviewers was randomized. RESULTS: The median value of the Barthel Index score was 30 (first to third interquartile range, 15 to 80) by telephone and 35 (15 to 75) by face-to-face (P=0.29). The weighted κ was 0.90 (95% CI, 0.85 to 0.94); κ values ranged from 0.70 (0.58 to 0.82) for bowel control to 0.91 (0.83 to 0.99) for bathing. CONCLUSIONS: Telephone assessment of stroke disability with the Barthel Index is reliable in comparison to direct face-to-face assessment.