Methods Employed to Assess Left Ventricular Ejection Fraction in Patients Referred for Cardiac Resynchronization Therapy in Poland as Compared to other European Countries. Results from the European Cardiac Resynchronization Therapy Survey II.
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National Institute of Cardiology, Warsaw, Poland
Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, Poland
Wrocław Medical University, Wrocław, Poland
Cardiology Division, Stavanger University Hospital, Stavanger, Norway
Institute of Internal Medicine, University of Bergen, Bergen, Norway
Karolinska University Hospital and Karolinska Institute, Stockholm, Sweden
Maciej Sterliński   

National Institute of Cardiology, Warsaw, Poland
Publication date: 2019-12-30
Heart Beat 2019;4:34–39
Precise evaluation of left ventricular ejection fraction (LVEF) < 35% is a crucial guidelines indiciation criterion for implanting cardiac resynchronization therapy (CRT) in patients with congestive heart failure (HF).

Material and methods:
We present the data from 1241 polish (PL) and 9847 other European countries (OEC) pts (aged: 67.7 ± 9.7 and 68.6 ± 10.9, ns, M/F: 81.3%/18.7% and 75%/25% resp., p* - stands for statistical significance) with their LVEF and the measuring methods used in the European CRT Survey II database.

Mean LVEF in CRT recipients was 26.4 ± 8.0% vs. 28.7 ± 8.1% . LVEF > 35% i.e. an indication outside of guidelines was found in 15.9% PL pts vs. 24.2% in OEC pts (p*). LVEF > 50% was found in 0.8% and 1.9% of pts resp. (p*). Concerning methodology echocardiography was used in 99.2% PL and 97.5% OEC pts (p*). Other imaging tools as: cardiac MRI, CT and scintigraphy were used in 2.2% vs 16.7% (p*) and in 1.4% and in 14.2% resp. (p*) more than one method has been used.

Echocardiographic LVEF measurement is the most frequent diagnostic tool both in Poland and OEC. Other methods such as cardiac MRI, CT and scintigraphy or multiple methods was more common in OEC than in Poland. CRT implantations, both in PL and OEC, are performed in significant proportion of patients with LVEF > 35%.