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Dr David Lefroy is a Consultant Cardiologist at Hammersmith Hospital. His appointment has been continuous and full time from 1997 to the present. His training and clinical practice has encompassed all aspects of cardiology in adult patients, focusing more on the management of cardiac arrhythmias in recent years. He is experienced in the use of catheter ablation and implanted cardiac pacemaker/defibrillators to treat heart rhythm disordered and currently continues a busy clinical practice in these areas.

Dr Lefroy studied medicine at Cambridge University and St Thomas' Hospital and qualified in 1985. He completed his postgraduate training in general medicine and specialised in cardiology from 1989 onwards. Following registrar, Medical Research Council research fellow, and senior registrar posts at Hammersmith, Royal Brompton, and St Mary's hospitals, he was appointed in 1996 to a British Heart Foundation International Fellowship in cardiac electrophysiology at the Brigham and Women's Hospital and Harvard Medical School in Boston, USA.

Dr David Lefroy was elected fellow of the Royal College of Physicians in 1999 and fellow of the Heart Rhythm Society in 2014.

• DC cardioversion
• Radiofrequency catheter ablation of cardiac arrhythmias
• Implantation of heart rhythm loop recorders (ILR)
• Pacemaker, defibrillator, and cardiac resynchronisation device implantation
• Cardiac pacemaker and defibrillator lead extraction
• pericardiocentesis
• endomyocardial biopsy

• Cardiac Electrophysiology
• Pacemakers
• Defibrillators
• Coronary Heart Disease
• Cardiomyopathy
• Atrial Fibrillation
• Cardiac Arrhythmia
• Heart Failure
• Chest Pain
• Palpitations
• Syncope
• Breathlessness