The majority of rapid arrhythmias can be cured.
1. Some rapid arrhythmias are due to an additional electrical pathway causing a reentrant rapid heart rate.
2. Some are due to irritable cells in heart beating very fast.
Both of these above can be permanenetly cured with one procedure by targeting the additional pathway and irritable focus of cells respectively.
Life threatening slow rhythms are treated with a pacemaker if they cannot be prevented.
Life threatening rapid heart arrhythmias are treated with defibrillators.