Effect of vitamin D supplements on left ventricular ejection fraction in patients with heart failure: A systematic review and meta-analysis of randomized controlled trials Aryan Naghedi, Hasan Haghaninejad, Hamidreza Varastehravan, Arvin Naghedi, Nima Farshadi

Prediction of response to cardiac resynchronization therapy using electrocardiographic criteria: A systematic review Paulo Dias Costa, João Pedro Bessa, Mariana Canelas Pais, Daniela Ferreira-Santos, Fernando Montenegro Sá, Matilde Monteiro-Soares, António Hipólito-Reis, Mário Martins Oliveira, Pedro Pereira Rodrigues

Impact of right ventricular stroke work index on predicting hospital readmission and functional status of patients with advanced heart failure Ebru Ozenc, Omer Yildiz, Onur Baydar, Nuran Yazicioglu, Nurcan Arat Koc