1The impact of post-operative atrial fibrillation on outcomes in coronary artery bypass graft and combined proceduresYau-Lam Alex Chau，Ji Won Yoo，Ho Chuen Yuen，Khalid Bin Waleed，Dong Chang，Tong Liu，Fang Zhou Liu，Gary Tse，Sharen Lee，Ka Hou Christien LiRESEARCH ARTICLE319-326
2Potentially inappropriate prescribing of cardiovascular system and antiplatelet/anticoagulant drugs among elderly patients:a Korean population-based national studyJongyeon Kim，Euna Han，Hee-Jin Hwang，Hyeonseok Cho，Young-Sang Kim，Hyejin Chun，Jinkwon Kim，Yon Chul Park，Hye-Young KangRESEARCH ARTICLE327-337
3Prevalence and prognostic value of cardiac troponin in elderly patients hospitalized for COVID-19Vincenzo De Marzo，Antonio Di Biagio，Roberta Della Bona，Antonio Vena，Eleonora Arboscello，Harusha Emirjona，Sara Mora，Mauro Giacomini，Giorgio Da Rin，Paolo Pelosi，Matteo Bassetti，Pietro Ameri，Italo Porto，GECOVID study groupRESEARCH ARTICLE338-345
4Cardiac papillary fibroelastomaDominika M Zoltowska，Edin Sadic，Kyeesha Becoats，Shreya Ghetiya，Aleem Azal Ali，Srinivasan Sattiraju，Emil MissovREVIEW346-351
5Anticoagulation for atrial fibrillation in heart failure patients:balancing between Scylla and CharybdisGrigorios Tsigkas，Anastasios Apostolos，Stefanos Despotopoulos，Georgios Vasilagkos，Angeliki Papageorgiou，Eleftherios Kallergis，Georgios Leventopoulos，Virginia Mplani，Ioanna Koniari，Dimitrios Velissaris，John ParissisREVIEW352-361
6Beta-blocker treatment in heart failure patients with atrial fibrillation:challenges and perspectivesEmmanouil Chourdakis，Ioanna Koniari，Dimitrios Velissaris，Grigorios Tsigkas，Nikolaos G Kounis，Neriman OsmanREVIEW362-375
7Atrial fibrillation in patients with systolic heart failure:pathophysiology mechanisms and managementIoanna Koniari，Eleni Artopoulou，Dimitrios Velissaris，Nicholas Kounis，Grigorios TsigkasREVIEW376-397
8Coronary artery disease presenting as intractable hiccups:an unclear mechanismAlor Sahoo，Sarabjeet SinghLETTER TO THE EDITOR398-399
9A valve-in-valve approach to manage severe bioprosthetic tricuspid valve stenosisDominika M Zoltowska，Naji Maaliki，Bashar Al-Turk，Andres M Pineda Maldonado，Srinivasan SattirajuLETTER TO THE EDITOR400-402
10A case series of precipitous cardiac tamponade from suspected perimyocarditis in COVID-19 patientsWilliam Kogler，Michael Omar，Naji Maaliki，Shaorinkumar Patel，Sam Foldy，Jose RuizLETTER TO THE EDITOR403-406
