RT Journal Article SR Electronic T1 A straightforward guide to the basic science behind arrhythmogenesis JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1907 OP 1915 DO 10.1136/heartjnl-2014-305647 VO 100 IS 24 A1 Berengere M Dumotier YR 2014 UL http://heart.bmj.com/content/100/24/1907.abstract AB The underlying mechanisms behind cardiac arrhythmias are described in this manuscript. In clinical practice, significant arrhythmias are unpredictable, and under some conditions, potentially life-threatening. How can basic science help improve our understanding of molecular entities and factors behind the arrhythmia to advance, develop, adapt or deliver available medications? Structural heart disease and remodelling (eg, heart failure, cardiomyopathy), the presence of modulating factors (ie, diabetes mellitus, autonomic nervous system), genetic predispositions (ie, channelopathies) are considerable preconditions, and influence the development of an arrhythmia. Cardiac arrhythmias may indeed share common basic mechanisms, while elements and substrates perpetuating these may be different and ultimately manifest as various ECG abnormalities. This article lists cellular and subcellular iatrogenic disorders responsible for abnormal impulse generation, or conduction disturbances, including the latest development in theories and biological research, for a better understanding of cellular disorders behind arrhythmogenesis.