How long does a cardiac MRI take?

Consultant cardiologist Dr Joban Sehmi reveals how long a cardiac MRI takes.

If you are referred for a cardiac MRI, you’ll be asked to come in approximately half an hour before your scan time. You’ll be met by a member of the MRI team who will go through a safety questionnaire to ensure that it’s safe for you to be in an MRI environment. Once this is complete, you’re often asked to change into a hospital gown, and a small tube is placed in a vein within your arm through which dye can be given.

The MRI itself is in a specialized room. The MRI scanner looks rather like a large tunnel. Once you’re in the machine itself, it is rather noisy, and you will be given headphones for your protection. The technician carrying out the MRI will be in constant contact with you via the headphones. The MRI scan itself is rather noisy, and it can be quite disconcerting, but again, after five minutes, you will become accustomed to that environment.

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The scan itself lasts about 45 minutes to an hour, and towards the end of the scan, a dye is administered, and more detailed images are taken. After the scan, you’re normally monitored for about 15 to 20 minutes to ensure that you’re well and you have no adverse effects from the dye. After which, you’ll be allowed to go home.

I invite you to book a consultation with Many Beats if you have any concerns about your heart health or if you’re concerned about risks for heart health going forward. We will see you in a timely fashion in a location in London, and we’ll provide you with very streamlined services so you can get a lot of investigations done, and a definitive management plan, which is tailored to you as the individual.

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About the cardiologists

The Many Beats team consists of not one, but four highly experienced consultant cardiologists

Dr Navtej Chahal

Consultant Cardiologist


Navtej is a Consultant Cardiologist at Many Beats. He also consults at the London Northwest NHS Trust and the Royal Brompton Hospital, London having qualified from Guy’s and St Thomas’ Medical School in 2001. He is an Honorary Senior Clinical Lecturer at Imperial College London

Dr Navin Chandra

Consultant Cardiologist


Navin is a Consultant Cardiologist at Many Beats. He is also a Consultant Cardiologist at Frimley Health NHS Foundation Trust and an Honorary Consultant Cardiologist at Royal Brompton & Harefield NHS Foundation Trust. He qualified from Guy’s, King’s & St. Thomas’s in 2004...

Dr Ahmed Elghamaz

Consultant Cardiologist


Ahmed is a Consultant Cardiologist at Many Beats. He also consults at Northwick Park Hospital and London North West Healthcare University Hospitals NHS Trust and is an Honorary Consultant Cardiologist at Royal Brompton & Harefield NHS Foundation Trust. He completed his junior…

Dr Joban Sehmi

Consultant Cardiologist


Joban is a Consultant Cardiologist at Many Beats. His NHS practice is at West Hertfordshire Hospitals NHS trust. He sees patients privately at Spire in Bushey and Bishops Wood Hospital in Northwood. He trained in medicine at Guy’s and St. Thomas’ medical school and qualified in 2003 with numerous academic awards…