Dr Peter O'Callaghan

Dr Peter O'Callaghan

Consultant Cardiologist and Heart Rhythm Specialist


Specialises in

  • Palpitations
  • Atrial fibrilation (AF)
  • Dizzy spells and blackouts

Also available for:

Virtual consultations:

At Spire Cardiff Hospital I provide a comprehensive heart rhythm service including the investigation and management of patients with palpitations, blackouts and cardiac arrest survivors or their family members, management of atrial fibrillation, Wolff Parkinson White Syndrome, supraventricular tachycardias (SVTs), ablation of tachycardias and implantation of pacemakers, defibrillators and biventricular pacing systems.

I am the lead clinician for heart rhythm and pacing services at the University Hospital of Wales, Cardiff, providing tertiary referral services for South East Wales, a referral population of 1.3 million.

Prior to my consultant appointment in 2001 I trained at Massachusetts General Hospital, Boston and St George's Hospital, London having entered the speciality of electrophysiology in 1994. My main interests lie in curing ablatable tachycardias and implantation of devices to prevent blackouts or sudden death (pacemakers and defibrillators) or to treat heart failure (biventricular pacemakers).


General Medical Council Number: 4478711

Treatment information

Some of the principal treatments carried out by Dr Peter O'Callaghan at Spire include:


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Additional information

Arrhythmia (Electrophysiology)
Atrial fibrillation

Special clinical interests: Investigation of patients with palpitations, bradycardias, tachycardias, blackouts, syncope, cardiac arrest survivors, assessment of individual sudden cardiac death risk and families with inherited arrhymia disorders, management of all arrhythmia disorders including WPW syndrome and atrial fibrillation, cardioversion of atrial fibrillation, ablation and cure of tachycardias (AVNRT, accessory pathways, WPW syndrome, atrial flutter, etc), device implantation including pacemakers, Implantable cardioverter defibrillators (ICDs), implantable loop recorders (Reveal devices), workup and management of medically refractory heart failure patients including implantation of biventricular pacemakers.

Consultant Cardiologist and Electrophysiologist, University Hospital of Wales, Cardiff

I'm a graduate of University College Cork, Ireland. During my years in training I lived in Dublin, Boston and London. I'm married with two children, my main hobbies are skiing, horse-riding and renovating old houses.

Telephone 0292 073 6011
Private secretary Tracy
Private secretary email tracy.gibbs@spirehealthcare.com