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Dr Karthik Viswanathan

Consultant Cardiologist And Electrophysiologist

MBBS, MRCP(UK), MD(Res), Certified Electrophysiology Specialist (CEPS -USA)

Practices at: The Huddersfield Hospital

A photo of Dr Karthik Viswanathan

Personal Profile

After completing his post-graduate training in general medicine and obtaining MRCP(UK), Dr Viswanathan gained extensive experience in cardiology working across both district general and tertiary care hospitals in Yorkshire over nine years, and completed his specialist cardiology training at the Yorkshire Heart Centre in Leeds in June 2013.

He then worked at the prestigious Toronto General Hospital, UHN, Toronto, Canada, completing a Fellowship in Cardiac Electrophysiology. He returned to the UK in March 2015 and worked as a Consultant Cardiologist in two large tertiary centre teaching hospitals - the Freeman Hospital in Newcastle-upon-Tyne and the Royal Brompton and Harefield hospitals in London.

Since July 2017, Dr Viswanathan works at Calderdale and Huddersfield NHS Trust as a Consultant Cardiologist. He manages patients across the full spectrum of cardiac illnesses, with two outpatient general cardiology NHS clinics every week. He also has particular specialist expertise in managing all types of cardiac rhythm abnormalities or arrhythmias and in performing implantation (and monitoring of) of cardiac devices, ranging from loop recorders (including Linq devices), pacemakers and defibrillators (including cardiac resynchronisation devices and His bundle pacing).

In 2017, Dr Viswanathan established a specialist Arrhythmia clinic locally for the population of Huddersfield and Calderdale CCGs - dedicated to providing holistic care of patients diagnosed with supraventricular tachycardia, atrial flutter and atrial fibrillation. This award-winning service has been recognised nationally for its excellent patient outcomes. He is also the clinical lead for a new Inherited Cardiomyopathy satellite clinic at Calderdale Royal Hospital in conjunction with the regional service based at Leeds General Infirmary (to start May 2019).

Dr Viswanathan is passionate about encouraging patient choice and participation in decision-making and has been instrumental in setting up Patient support groups (for Atrial Fibrillation) to promote patient empowerment and education. 

Dr Viswanathan is also very active in designing and delivering education and training for aspiring cardiologists, GPs and allied health professionals, both locally and at regional level. Building on his extensive experience in cardiology research (which includes a MD(Res) degree from the University of Leeds), Dr Viswanathan continues to lead as Investigator for clinical research trials in cardiology.

In his spare time, Dr Viswanathan enjoys playing badminton and running, and last but not the least, making the most of the time with his two young children

When booking in with Dr Viswanathan, it is standard to have an ECG undertaken at your first appointment, if you have not recently had one with your GP or at a separate appointment prior to consultation. 

Clinical Interests

Clinical Interests

Dr Viswanathan has a broad range of interests within cardiology, including managing patients with suspected cardiac chest pain, angina, blackouts (syncope), palpitations, heart failure, cardiomyopathy, inherited heart disease and arrhythmias. He is also certified as an adult cardiac electrophysiologist, and is clinical lead for the Arrhythmia clinic at Calderdale and Huddersfield hospitals NHS trust. He is independently proficient in performing all pacemaker and defibrillator implants and catheter ablations for cardiac arrhythmias, including supraventricular tachycardia and atrial fibrillation.

Professional Memberships

Professional Memberships

  • Royal College of Physicians (London)
  • British Cardiovascular Society
  • British Heart Rhythm Society
  • Heart Rhythm Society (USA)
  • European society of Cardiology
  • Medical Protection Society
  • British Medical Association