İskemik dilate kardiyomiyopatili hastalarda aritmi sıklığı ile ekokardiyografi speckle tracking metodu ile hesaplanan integrated backscatter arasındaki ilişki

Tez Türü: Tıpta Uzmanlık

Tezin Yürütüldüğü Kurum: İstanbul Üniversitesi, İstanbul Tıp Fakültesi, Dahili Tıp Bilimleri Bölümü, Türkiye

Tez Danışmanı: Ahmet Kaya Bilge

Tezin Onay Tarihi: 2014

Tezin Dili: Türkçe

Özet:

Background: Ventricular scars due to myocardial infarction provide a substrate for ventricular arrhythmias, and cardiac magnetic resonance (CMR) is the golden standard for the quantification of scar tissue magnitude. CMR has still limitations with patients with ICD despite ICD's becoming MR-compatible. We investigated the association between calibrated integrated backscatter (cIBS) and arrhythmia frequency in patients with ICD.

Methods: Thirty-two ischemic dilated cardiomyopathy (ICM) patients with VVI-ICD (mean age 66.56 ± 9.05, 28 male, and four female) were divided into three groups according to their arrhythmia frequency (ventricular arrhythmia-[VA -], VA + [VA +], and arrhythmia storm [AS]). Then with transthoracic echocardiography (TTE), all patients' cIBS values were calculated and these values were compared with the patients' arrhythmia frequency.

Results: cIBS values of patients with VA + and AS were significantly higher in the apical-septal (0.66 ± 0.11 vs. 0.50 ± 0.16, p = .008) and apical-lateral (0.62 ± 0.19 vs. 0.46 ± 0.18, p = .041) segments compared to those of patients with VA -. The cIBS values of apical-septal (0.50 ± 0.16 vs. 0.65 ± 0.08 vs. 0.66 ± 0.13 respectively, p = .032) and apical-anterior (0.53 ± 0.22 vs. 0.48 ± 0.17 vs. 0.79 ± 0.23 respectively, p = .03) segments were significantly different between the groups. Furthermore, in the post hoc analysis, the difference was significantly higher in VA + than VA - in the apical-septal segment and higher in AS than VA + in apical-anterior segments.

Conclusion: Our findings suggest an association between the cIBS values and arrhythmia frequency in the study group.