Dalimunthe, N.N., Division of Cardiovascular, Department of Internal Medicine, Faculty of Medicine, Universitas Sumatera Utara. Address: Jl. dr. T. Mansur. No.5 Medan, Sumatera Utara, 20153, Indonesia, Division of Cardiology, Department of Internal Medicine, Faculty of Medicine, Universitas Indonesia/Cipto Mangunkusumo Hospital. Address: Jl. Salemba Raya No. 6 Jakarta Pusat10430, Indonesia; Alwi, I., Division of Cardiology, Department of Internal Medicine, Faculty of Medicine, Universitas Indonesia/Cipto Mangunkusumo Hospital. Address: Jl. Salemba Raya No. 6 Jakarta Pusat10430, Indonesia; Nasution, S.A., Division of Cardiology, Department of Internal Medicine, Faculty of Medicine, Universitas Indonesia/Cipto Mangunkusumo Hospital. Address: Jl. Salemba Raya No. 6 Jakarta Pusat10430, Indonesia; Shatri, H., Division of Cardiology, Department of Internal Medicine, Faculty of Medicine, Universitas Indonesia/Cipto Mangunkusumo Hospital. Address: Jl. Salemba Raya No. 6 Jakarta Pusat10430, Indonesia