Electrocardiogram specialists in London

One Heart Clinic City is a specialist cardiac centre offering world-class expertise and cutting-edge diagnostics in the heart of London. The clinic is easily accessible from major train stations including Waterloo and Liverpool Street, making it a convenient choice for patients living and working in the capital.Providing the full spectrum of cardiac diagnostic and consultation services on-site, the City clinic ensures seamless, efficient care under one roof. As part of the wider One Heart Clinic network, patients benefit from the expertise of leading cardiologists who also hold senior posts at London teaching hospitals and have trained at prestigious institutions in London and Cambridge.With state-of-the-art facilities and a strong patient-centred ethos, One Heart Clinic City combines advanced technology with the collaborative knowledge of its expert team. The result is tailored, evidence-based treatment designed to deliver the highest standards of care and the best possible outcomes for every patient.

The Devonshire Diagnostic Centre offers fast, personalised diagnostic care in Marylebone, open six days a week. Same-day appointments and results within 48 hours are standard. World-renowned consultants and trained radiographers carry out multiple tests in one visit, with minimally invasive treatments available on the same day when clinically appropriate.What medical services does it specialise in? The Devonshire Diagnostic Centre at The Harley Street Clinic brings together specialists across a focused range of disciplines, each supported by advanced diagnostic technology. Breast care is also available, with specialist assessment provided to patients as required. Cardiology (cardiac care and investigations) Otolaryngology — ear, nose and throat (ENT) Endocrinology and diabetes care Medical oncology (cancer treatment) Orthopaedic surgery Urology Vascular surgery What tests and treatments does it offer? Some of the medical tests and care services offered at Devonshire Diagnostic Centre include: digital X-ray, MRI, CT scanning, cancer screening, cystoscopy and diagnostic ultrasound. What quality and safety standards does Devonshire Diagnostic Centre (HCA) meet? The Devonshire Diagnostic Centre holds a CQC Good rating. Its clinical radiologists are qualified doctors intensively trained to perform and interpret medical imaging. The centre supports seamless onward referral within the HCA UK network for complex or specialist care beyond diagnostics. Where is Devonshire Diagnostic Centre (HCA) located? 13–19 Devonshire Street, Marylebone, W1G. Near Great Portland Street and Warren Street stations (10 min walk). On-road metered parking nearby. What other HCA Healthcare UK centres are there in Central London? The Harley Street Clinic — Located at 35 Weymouth Street, Marylebone. The Princess Grace Hospital — Full-service private hospital on Nottingham Place, Marylebone. The Princess Grace Hospital Outpatients — Outpatient and diagnostic centre at 30 Devonshire Street. Women's Health Centre (HCA) — Specialist women's health services on Harley Street. Leaders in Oncology Care (LOC) — Specialist cancer care centre on Harley Street.