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    Effect of Remote Ischemic Postconditioning on Left Ventricular Mechanics
    (Wiley, 2015) Nacar, Alper Bugra; Topcu, Selim; Kurt, Mustafa; Tanboga, Ibrahim Halil; Karakas, Mehmet Fatih; Buyukkaya, Eyup; Aksakal, Enbiya
    BackgroundRemote ischemic postconditioning (RIPC) decreases infarct size and prevents left ventricular (LV) remodeling in patients with myocardial infarction. However, there is no study that evaluates the effect of RIPC on LV mechanics assessed by speckle tracking echocardiography. Therefore, we aimed to test the effects of RIPC on LV deformation parameters such as strain, strain rate, rotation, and twist in healthy subjects. MethodsThe study group consisted of 22 healthy subjects. To test the effects of RIPC, 3 cycles of reperfusion followed by ischemia (each lasting 10 or 30seconds) were applied immediately after 20minutes of nondominant arm ischemia. Transthoracic echocardiography (TTE) was obtained at baseline and repeated 30minutes after the completion of these cycles. In TTE images, apical 4-3-2 chamber longitudinal strain (LS)/strain rate, basal and apical circumferential strain/strain rate, and rotational parameters, such as basal rotation, apical rotation, and LV twist, were recorded. ResultsApical 4-3-2 chamber LS and apical circumferential strain/strain rate measurements were comparable before and after RIPC, whereas basal circumferential strain was significantly decreased after RIPC (-233.4 vs. -18.9 +/- 6.9, P=0.017). After RIPC, apical rotation was significantly increased (11.6 +/- 3.7 vs. 16.7 +/- 4.0, P<0.001) and basal rotation was significantly decreased (-6.1 +/- 2.1 vs. -4.7 +/- 2.4, P=0.03).Consequently, net LV twist was significantly increased (17.4 +/- 4.5 vs. 21.7 +/- 4.7). ConclusionsWe proposed that RIPC affects the rotational mechanics of the heart rather than longitudinal mechanics. These results might give new insights into understanding the favorable effects of the post- conditioning.
  • Küçük Resim
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    Thrombus aspiration in patients with ST elevation myocardial infarction: Meta-analysis of 16 randomized trials
    (Kare Publ, 2015) Tanboga, Ibrahim Halil; Topcu, Selim; Aksakal, Enbiya; Kurt, Mustafa; Kaya, Ahmet; Oduncu, Vecih; Sevimli, Serdar
    Objective: The mortality rate is high in some patients undergoing primary percutaneous coronary intervention (PPCI) because of ineffective epicardial and myocardial perfusion. The use of thrombus aspiration (TA) might be beneficial in this group but there is contradictory evidence in current trials. Therefore, using PRISMA statement, we performed a meta-analysis that compares PPCI+TA with PPCI alone. Methods: Sixteen studies in which PPCI (n=5262) versus PPCI+TA (n=5256) were performed, were included in this meta-analysis. We calculated the risk ratio (RR) for epicardial and myocardial perfusion, such as the Thrombolysis In myocardial Infarction (TIMI) flow, myocardial blush grade (MBG) and stent thrombosis (ST) resolution (STR), and clinical outcomes, such as all-cause death, recurrent infarction (Re-MI), target vessel revascularization/target lesion revascularization (TVR/TLR), stent thrombosis (ST), and stroke. Results: Postprocedural TIMI-III flow frequency, postprocedural MBG II-III flow frequency, and postprocedural STR were significantly high in TA+PPCI compared with the PPCI alone group. However, neither all-cause mortality [6.6% vs. 7.4%, RR=0.903, 95% confidence interval (CI): 0.785-1.038, p=0.149] nor Re-MI (2.3% vs. 2.6%, RR=0.884, 95% CI: 0.693-1.127, p=0.319), TVR/TLR (8.2% vs. 8.0%, RR=1.028, 95% CI: 0.900-1.174, p=0.687), ST (0.93% vs. 0.90%, RR=1.029, 95% CI: 0.668-1.583, p=0.898), and stroke (0.5% vs. 0.5%, RR=1.073, 95% CI: 0.588-1.959, p=0.819) rates were comparable between the groups. Conclusion: This meta-analysis is the first updated analysis after publishing the 1-year result of the Thrombus Aspiration during ST-Segment Elevation Myocardial Infarction trial, and it showed that TA did not reduce the rate of all-cause mortality, Re-MI, TVR/TLR, ST, and stroke.