Welcome on behalf of the Editors! Letter from the editor -- Building the new digital world: launch of the European Heart Journal - Digital Health -- Insights from Twitter about novel COVID-19 symptoms -- Young and computer-literate healthcare professionals have the greatest expectations for heart failure telemonitoring -- COVID-19 pandemic: practical considerations on rapid initiation of remote care in chronic cardiac patients -- Social media in cardiovascular medicine: a contemporary review -- Cost-effectiveness of cardiac telerehabilitation in coronary artery disease and heart failure patients: systematic review of randomized controlled trials -- Contact-free sensor signals as a new digital biomarker for cardiovascular disease: chances and challenges -- Increased myocardial stiffness more than impaired relaxation function limits cardiac performance during exercise in heart failure with preserved ejection fraction: a virtual patient study -- Prediction of coronary artery calcium scoring from surface electrocardiogram in
atherosclerotic cardiovascular disease: a pilot study -- Immersive 3D virtual reality imaging in planning minimally invasive and complex adult cardiac surgery -- Using social media to recruit study participants for a randomized trial for hypertension -- Automated lumen segmentation using multi-frame convolutional neural networks in intravascular ultrasound datasets -- How to initiate eHealth in congenital heart disease patients?.