Holter analysis (24/48 hour ECG) for assessment of cardiogenic syncope, Arrhythmias and for assessing the need for pacemaker implants. A small walkman size device connected to the chest wall with wires, which records the ECG for 24 hours. This will be analyzed by a special computer. The final report shows us the 24 hour pattern of the heart rhythm at work and at rest. The readings are evaluated by our senior consultants.