Journals / Türk Kardiyoloji Derneği Arşivi / 2006 / Cilt: 34 - Sayı: 2

The effect of levosimendan infusion on QT dispersion in patients with ischemic cardiomyopathy and acute decompensated heart failure

İskemik kardiyomiyopatinin akut dekompansasyonunda levosimendan tedavisinin QT dispersiyonu üzerine etkisi

Pages
84–88
Publication Date
2022-11-05
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Levosimendan administration was associated with decreased QTd (52±20 msec vs 61±24 msec, p=0.09) and QTc (63±25 msec vs 72±29 msec, p=0.11) values, without exerting a significant effect.Conclusion: Our results suggest that therapeutic doses of levosimendan do not exert a negative effect on ventricular homogeneity.

📌 3 Key Takeaways

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Objective & Hypothesis:Objectives: Levosimendan, a calcium sensitizer, improves myocardial contractility without increasing myocardial oxygen demand.
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Key Findings & Data:We investigated the effect of levosimendan on QT dispersion in patients with decompensated heart failure.Study design: The study included 20 male patients (mean age 59±10 years; range 48 to 70 years) who were admitted with decompensated heart failure (New York Heart Association functional class III-IV).
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Conclusion & Impact:Levosimendan administration was associated with decreased QTd (52±20 msec vs 61±24 msec, p=0.09) and QTc (63±25 msec vs 72±29 msec, p=0.11) values, without exerting a significant effect.Conclusion: Our results suggest that therapeutic doses of levosimendan do not exert a negative effect on ventricular homogeneity.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objectives: Levosimendan, a calcium sensitizer, improves myocardial contractility without increasing myocardial oxygen demand. We investigated the effect of levosimendan on QT dispersion in patients with decompensated heart failure.Study design: The study included 20 male patients (mean age 59±10 years; range 48 to 70 years) who were admitted with decompensated heart failure (New York Heart Association functional class III-IV). Intravenous levosimendan was administered with an initial bolus dose of 12 µg/kg for 10 min, followed by a continuous infusion of 0.1 µg/kg/min for 24 hours. Transthoracic echocardiograpy was performed and electrocardiograms were obtained before and after drug infusion. QT dispersion (QTd) was defined as the difference between the maximum (QTmax) and the minimum (QTmin) QT duration, and the value was corrected for heart rate (QTc).Results: Left ventricular ejection fraction was 35% or less in all the patients before and after the infusion. No significant differences were found before and after treatment with respect to QTmax and QTmin durations. Levosimendan administration was associated with decreased QTd (52±20 msec vs 61±24 msec, p=0.09) and QTc (63±25 msec vs 72±29 msec, p=0.11) values, without exerting a significant effect.Conclusion: Our results suggest that therapeutic doses of levosimendan do not exert a negative effect on ventricular homogeneity.

Özet

Amaç: Kalsiyum duyarlılaştırıcı inotropik bir ajan olan levosimendan, miyokardın oksijen tüketimini artırmadan miyokardiyal kontraktiliteyi artırır. Bu çalışmada dekompanse kalp yetersizliği olan hastalarda levosimendanın QT dispersiyonu (QTd) üzerine olan etkisi araştırıldı.Çalışma planı: Kronik kalp yetersizliğinin akut dekompansasyonu tanısıyla tedavi edilmek üzere yatırılan, New York Kalp Derneği sınıflamasına göre sınıf III-IV kalp yetersizliği olan 20 hasta (20 erkek; ort. yaş 59±10; dağılım 48-70) çalışmaya alındı. İntravenöz levosimendan 10 dakika süreyle 12 µg/kg yükleme dozunu takiben, 0.1 µg/kg/dk dozunda 24 saatlik infüzyon şeklinde uygulandı. İnfüzyon öncesi ve sonrasında hastaların transtorasik ekokardiyografileri yapıldı ve elektrokardiyografileri çekildi. QTd, en uzun (QTmaks) ve en kısa (QTmin) QT süresi arasındaki fark olarak tanımlandı ve bulunan değer kalp hızına göre düzeltildi (QTdc).Bulgular: İnfüzyon öncesi ve sonrasında tüm hastalarda ejeksiyon fraksiyonu %35 veya altında idi. Tedavi öncesi ve sonrası değerler arasında QTmaks ve QTmin süreleri açısından anlamlı farklılık saptanmadı. İstatistiksel olarak anlamlı olmamasına karşın, tedavi sonrası QTd ve QTdc değerleri tedavi öncesi değerlere göre daha düşüktü (sırasıyla QTd için 61±24 msn, 52±20 msn, p=0.09; QTdc için 72±29 msn, 63±25 msn, p=0.11).Sonuç: Bulgularımız, tedavi dozlarında levosimendan ile ventriküler repolarizasyon homojenitesinin olumsuz etkilenmediğini düşündürmektedir.

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Cite This Article

ÜNAL, Ş., KAŞIKÇIOĞLU, A. H., UYAREL, H., ÖZTÜRK, R., ÇAM, N., AKYOL, A., ÖKMEN, E., TARTAN, Z. (2022). The effect of levosimendan infusion on QT dispersion in patients with ischemic cardiomyopathy and acute decompensated heart failure. Türk Kardiyoloji Derneği Arşivi, Cilt: 34 - Sayı: 2, 84–88. https://ajindex.com/articles/633681

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