Left atrial appendage dysfunction in acute cerebral embolism patients with sinus rhythm: correlation with pulse wave tissue Doppler imaging.
To evaluate left atrial appendage (LAA) dysfunction using left atrial pulse-wave tissue Doppler imaging (PW-TDI) in acute cerebral embolism (ACE) patients with sinus rhythm (SR), transthoracic (TTE) and transesophageal echocardiograhy (TEE) were performed in 60 consecutive patients with SR without obvious left ventricular dysfunction within 2 weeks after ACE. Two groups were identified: LAA dysfunction [LAA emptying peak flow velocity (LAA-eV) <0.55 m/s, n = 20, age 65 ± 10 years] and without LAA dysfunction (LAA-eV ≥ 0.55 m/s, n = 40, age 64 ± 10 years) on TEE. Left atrial wall motion velocity (WMV) was obtained from PW-TDI, with the sample volume placed at the left atrial anterior wall adjacent to ascending aortic inferior wall from the long axis view on TTE. WMVs showed triphasic waves: after the P wave (La') during systole (Ls'), and during early diastole. La' and Ls' were significantly lower in the group with versus without LAA dysfunction (4.9 ± 1.4 vs. 7.7 ± 1.8 cm/s, p < 0.0001; 5.3 ± 2.0 vs. 6.7 ± 1.9 cm/s, p < 0.001, respectively) and prevalence of paroxysmal atrial fibrillation, left atrial volume index, and serum levels of brain natriuretic peptide were significantly higher (60 vs. 15 %, p < 0.001; 32 ± 13 vs. 24 ± 13 ml/m(2), p < 0.05; 174 ± 279 vs. 48 ± 68 pg/ml, p < 0.01, respectively). La' was an independent predictor of LAA dysfunction (OR 0.380, 95 % CI 0.156-0.925, p < 0.05), and was significantly correlated with LAA-eV (r = 0.594, p < 0.0001) and LAA fractional area change (r = 0.682, p < 0.0001). The optimal cut-off value for LAA-eV < 0.55 m/s was 5.5 cm/s (sensitivity 83 %, specificity 88 %). La' is a useful and convenient strong predictor of LAA dysfunction in ACE patients with SR.
Department of Cardiology, Kitamurayama Municipal Hospital, 2-15-1 Onsen-machi, Higashine, Yamagata, 999-3792, Japan, kz.kaneko@hosp-kitamurayama.jp.
Kazuyoshi
K
Kaneko
Yoichiro
Y
Otaki
Shinpei
S
Kadowaki
Taro
T
Narumi
Hiroki
H
Saito
Nobuyuki
N
Kiribayashi
Koki
K
Omi
Toshiki
T
Sasaki
Takeshi
T
Niizeki
Shigeo
S
Sugawara
Isao
I
Kubota
D000368:Aged; D020517:Atrial Appendage / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D001281:Atrial Fibrillation / Q000097:blood / Q000150:complications* / Q000000981:diagnostic imaging / Q000503:physiopathology; D016279:Atrial Function, Left; D015415:Biomarkers / Q000097:blood; D018619:Echocardiography, Doppler, Pulsed; D017548:Echocardiography, Transesophageal; D005260:Female; D006801:Humans; D020766:Intracranial Embolism / Q000097:blood / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood; D015588:Observer Variation; D016017:Odds Ratio; D010865:Pilot Projects; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012307:Risk Factors
D015415:Biomarkers; D020097:Natriuretic Peptide, Brain