Dr Konstantinos Vakalis is consultant cardiologist in London, UK at Queen Elizabeth Hospital (Lewisham and Greenwich NHS trust) and at Harefield Hospital (Guy’s and St Thomas’ NHS Trust). He was trained in cardiology in Greece and in the UK. He has been awarded the honorary title of Fellow of the European Cardiology Society (FESC) and Fellow of the European Society of Cardiovascular Imaging (FEACVI). His main interests in cardiology include imaging and heart failure. His clinical expertise is stress echocardiography. He is the heart failure lead at Queen Elizabeth Hospital.

A drug allergy is an allergic reaction to medication that occurs when the immune system is incorrectly activated by a drug. Vaccine allergy is very rare. It is usually caused by allergy to an excipient in the vaccine, rather than the active ingredient.

Dr Hiva Fassihi and Dr John Ferguson discuss Phototherapy and how it differs from UVB Phototherapy.

A urinary tract infection (UTI) is an infection that affects any part of the urinary system, including the bladder, urethra, ureters, and kidneys.

A second-trimester scan is performed when you're between 20 and 22 weeks pregnant to assess fetal development and health.

Written by Dr Iqbal Malik, Consultant Cardiologist