7 research outputs found

    The prognostic value of contrast echocardiography, electrocardiographic and angiographic perfusion indices for prediction of left ventricular function recovery in patients with acute myocardial infarction treated by percutaneous coronary intervention

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    Background: Fast and effective culprit artery patency restoration is important in acute myocardial infarction (MI) but does not ensure that tissue perfusion related to a better prognosis in the long-term follow-up is achieved. In this study we compared the prognostic value of myocardial perfusion contrast echocardiography with other well-known electrocardiographic and angiographic indices of preserved tissue perfusion. Material and methods: We studied 114 consecutive patients, of whom 85 were male, aged 57.9 &#177; 11 years, within 12 hours of the onset of symptoms of their first anterior myocardial infarction. These were treated with primary PCI, after which PCI myocardial blush grading was assessed (MBG 0-1 no perfusion, 2-3 normal perfusion). One hour after PCI a reduction of > 50% in the sum of ST-segment elevation (&#931;ST 50%) was assessed as an indicator of perfusion restoration. During the first 24 hours continuous ECG monitoring recorded reperfusion arrhythmias (RA) and the time required for ST-segment reduction to exceed 50% in the single lead with the highest ST elevation (&#916;t ST 50%). On the next day of MI, after LVEF evaluation, real-time myocardial contrast echocardiography (RT-MCE) was performed to assess perfusion in dysfunctional segments. The reperfusion index as an average of the dysfunctional segment perfusion score was determined. Regional and global LV function was assessed again one month after MI. An LVEF increase of over 5% divided the patients into two groups: group A with LVEF improvement (72 pts) and group B without LVEF improvement (42 pts). Results: In group A baseline LVEF was 41.9 &#177; 7.1% and in group B it was 38.9 &#177; 7.4% (p = NS). The reperfusion indices were 1.59 and 0.78 (p < 0.001) respectively. MBG 2-3 occurred more often in group A (64%) than in group B (34%) p < 0.001. &#931; ST50% and &#916;t ST 50%, after determination of the cut point on the ROC curve (61 min), occurred in 47 and 48 patients in group A and 17 and 16 patients in group B respectively. The accuracy of the tests under discussion for LVEF prognosis was 76.3%, 64%, 63.2% and 64.9% for RT-MCE, MBG, SST50% and &#916;t ST 50% respectively. Conclusions: Myocardial perfusion echocardiography had a high prognostic value for the prediction of LV global function improvement. It turned out to be the best predictor among the other angiographic, echocardiographic and electrocardiographic markers

    Por贸wnanie warto艣ci prognostycznej echokardiografii kontrastowej z elektrokardiograficznymi i angiograficznymi wska藕nikami oceny perfuzji w przewidywaniu poprawy funkcji skurczowej lewej komory u pacjent贸w z ostrym zawa艂em serca leczonych pierwotn膮 interwencj膮 wie艅cow膮

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    Wst臋p: Szybkie i skuteczne przywr贸cenie dro偶no艣ci t臋tnicy dozawa艂owej, a przede wszystkim trwa艂e przywr贸cenie perfuzji tkankowej, wi膮偶膮 si臋 z popraw膮 rokowania i lepsz膮 funkcj膮 skurczow膮 lewej komory w obserwacji odleg艂ej w por贸wnaniu z osobami z zaburzon膮 perfuzj膮. Celem przedstawionego badania jest por贸wnanie warto艣ci prognostycznej perfuzyjnej echokardiografii kontrastowej z innymi, og贸lnie uznanymi elektrokardiograficznymi i angiograficznymi wska藕nikami oceny perfuzji tkankowej. Materia艂 i metody: Badaniem obj臋to kolejnych 114 pacjent贸w (85 M; 57,9 &plusmn; 11 lat) z pierwszym zawa艂em 艣ciany przedniej (12 godzin od pocz膮tku) leczonych PCI. Po udanej PCI dokonywano angiograficznej oceny perfuzji (MBG 0-1 brak perfuzji, 2-3 zachowana perfuzja), a nast臋pnie po 60 min wykonywano EKG w celu oceny stopnia redukcji sumy uniesie艅 odcinka ST. Zmniejszenie sumy uniesie艅 powy偶ej 50% (&#931;ST50%) by艂o wska藕nikiem powrotu perfuzji. Przez pierwsze 24 godziny monitorowano 12-odprowadzeniowe EKG w celu rejestracji arytmii w czasie reperfuzji (RA) i czasu zmniejszenia uniesienia ST o ponad 50% w pojedynczym odprowadzeniu z najwy偶szym uniesieniem ST (&#916;tST50%). W 2. dobie zawa艂u po oznaczeniu frakcji wyrzutowej lewej komory (LVEF) oceniano perfuzj臋 w segmentach dysfunkcyjnych, pos艂uguj膮c si臋 echokardiografi膮 kontrastow膮 (RT-MCE), a wska藕nik perfuzyjny (RPSI) stanowi艂 艣redni膮 z wynik贸w perfuzji segment贸w dysfunkcyjnych. Regionaln膮 i globaln膮 kurczliwo艣膰 LV oceniano ponownie po miesi膮cu, a na podstawie wzrostu LVEF o ponad 5% podzielono pacjent贸w na grupy A (z popraw膮 funkcji skurczowej; 72 osoby) i B (bez poprawy funkcji skurczowej; 42 osoby).Wyniki: W grupie A LVEF wynosi艂a 41,9% &plusmn; 7,1%, a w grupie B &#8212; 38,9 &plusmn; 7,4% (p = NS), natomiast wska藕nik RPSI odpowiednio: 1,59 i 0,78 (p < 0,001). Prawid艂owa perfuzja oceniana angiograficznie (MBG 2-3) wyst臋powa艂a cz臋艣ciej w grupie A (64%) w stosunku do grupy B (34%; p < 0,001). W艣r贸d badanych pacjent贸w &#931;ST50% i &#916;tST50% po wyznaczeniu punktu odci臋cia z krzywej ROC (61 min) wyst膮pi艂y u 47 i 48 pacjent贸w z grupy A oraz 17 i 16 z grupy B. Dok艂adno艣膰 omawianych test贸w dla prognozowania poprawy funkcji LV wynosi艂a odpowiednio: 76,3%, 64%, 63,2% i 64,9% dla RT-MCE, MBG, &#931;ST50% i &#916;tST50%. Wnioski: W badaniu wykazano wysok膮 warto艣膰 prognostyczn膮 echokardiografii perfuzyjnej w przewidywaniu poprawy globalnej funkcji skurczowej lewej komory, kt贸ra okaza艂a si臋 najlepszym predykatorem w艣r贸d pozosta艂ych wska藕nik贸w angiograficznych i elektrokardiograficznych

    Znaczenie rakownicze wzrostu st臋偶enia troponiny I po planowych zabiegach przezsk贸rnej rewaskularyzacji

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    Background: A mild and asymptomatic increase in the troponin level following elective percutaneous coronary interventions (PCI) has been widely reported, however, the prognostic role of this finding has not yet been well established.Aim: To assess prognostic value of troponin I level increase following elective PCI.Methods: The study group consisted of 90 consecutive patients who underwent elective PCI in our institution. Troponin I level (normal values 0.1 ug/L was observed in 66 (73%) patients; of whom, 8 patients had a marked (>1.0 ug/L) increase of troponin I, with a concomitant significant elevation of the CK-MB level. Patients with a positive troponin test developed systolic LV abnormalities more often than patients with a normal troponin I level following PCI (p1.0 ug/L) which was significantly more often than in the troponin-negative patients (p1.0 ug/L) increase in troponin I level identified patients at risk of MACE. An increase in troponin I level was similar following various types of PCI

    Prospektywne, randomizowane badanie por贸wnuj膮ce pierwotne bezpo艣rednie stentowanie i miniinwazyjne pomostowanie metod膮 endoscopic atraumatic coronary artery bypass u chorych ze zw臋偶eniem bli偶szego odcinka ga艂臋zi przedniej zst臋puj膮cej lewej t臋tnicy wie艅cowej

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    Background: The dynamic development of interventional cardiology resulted in an increasing proportion of patients treated with various forms of coronary angioplasty instead of surgery. On the other hand, it has been well established that the results of coronary artery by-pass surgery of the left anterior descending (LAD) coronary artery with the use of the internal mammary artery are excellent.Aim: To compare the results of primary direct stenting (PDS) and endoscopic atraumatic coronary artery bypass (EACAB) surgery in patients with an isolated proximal LAD type A or B1 lesion.Methods: This prospective and randomised study included 100 patients with an isolated critical (&ge;70%) LAD stenosis who underwent PDS (n=50) or EACAB (n=50).Results: After a six-month follow-up period, 32 (64%) PDS patients and 47 (94%) EACAB patients were angina-free. The rate of major cardiac adverse events (MACE) was significantly higher in the PDS group than in surgically treated patients (

    Incomplete stent apposition after implantation of paclitaxel-eluting stents or bare metal stents: insights from the randomized TAXUS II trial.

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    BACKGROUND: The clinical impact of late incomplete stent apposition (ISA) for drug-eluting stents is unknown. We sought to prospectively investigate the incidence and extent of ISA after the procedure and at 6-month follow-up of paclitaxel-eluting stents in comparison with bare metal stents (BMS) and survey the clinical significance of ISA over a period of 12 months. METHODS AND RESULTS: TAXUS II was a randomized, double-blind study with 536 patients in 2 consecutive cohorts comparing slow-release (SR; 131 patients) and moderate-release (MR; 135 patients) paclitaxel-eluting stents with BMS (270 patients). This intravascular ultrasound (IVUS) substudy included patients who underwent serial IVUS examination after the procedure and at 6 months (BMS, 240 patients; SR, 113; MR, 116). The qualitative and quantitative analyses of ISA were performed by an independent, blinded core laboratory.
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