FOR PATIENTS AND VISITORS: Masks and entrance screening are still required for all patients and visitors at Unity Health. Learn more about our current restrictions for visitors.

FOR URGENT VIRTUAL CARE: Information about Toronto’s Virtual Emergency Department

Cardiac Arrhythmia Service – Procedures

Clinics Our team Procedures Resources Research Fellowship

Cardiac Arrhythmia Service

The electrophysiology laboratory is an area where invasive procedures are performed to diagnose and/or treat various heart rhythm problems. Most patients are discharged home the same day of the procedure, although some may need to stay overnight depending on the timing and type of procedure.

Patient information

Contact information

For referrals – Telephone: 416-864-5152

Fax: 416-864-5348

  • Referral form (45 kb pdf file)
  • Booking coordinator (Joanna Connell): 416-864-6060 ext. 6526

A variety of cardiac devices can be implanted in or close to the heart to diagnose and treat various heart rhythm problems. This includes pacemakers, implantable defibrillators, and internal loop recorders. Procedures to implant these devices are done both in the Electrophysiology laboratory and the operating room. Most of these procedures are done through day surgery, such that patients are discharged home the same day of the procedure.

Patient information

Contact information

For referrals – Telephone: 416-864-5152

Fax: 416-864-5348

  • Referral form (45 kb pdf file)
  • Booking coordinator (Emily Little): 416-864-6060 ext. 2679

Patients who have a rhythm problem called atrial fibrillation or atrial flutter may require a shock to the heart in order to restore a normal rhythm. This type of procedure is called a cardioversion and is done as a same day procedure.

Patient information

Contact information

For referrals – Telephone: 416-864-5152

Fax: 416-864-5348

  • Referral form (45 kb pdf file)
  • Booking coordinator (Joanna Connell): 416-864-6060 ext. 6526

Back to St. Michael’s Cardiac Arrhythmia Service page

Last updated April 25, 2022