Cardiac arrhythmias The causes of abnormal heart rhythms are a focus of intense research. A number of types of cardiac arrhythmias have been identified and many effective treatments are now in place. By Dr Puneet Kakar and Professor Gregory YH Lip Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up