A pop-up clinic was set up in Leicester city centre offering a free heart check to people aged over 60 to test for a "subtle condition".
A team of cardiologists from Glenfield Hospital listened to people's hearts for murmurs, which helps towards diagnosing heart valve disease (HVD).
Consultant cardiologist Prof Jan Kovac said many people were unaware of the subtle signs of the disease, which can be mistaken for normal ageing.
University Hospitals of Leicester NHS Trust said it wanted to raise awareness of HVD, particularly amongst the Asian community, and help improve access to healthcare.
Symptoms of the disease include breathlessness, feeling dizzy or lightheaded, chest tightness and an increase in fatigue.
During the clinic at the Clock Tower on Tuesday, a check on Suryakant Patel heard a whooshing sound to his heartbeat and he was given a scan immediately.
Dr Anvesha Singh, honorary consultant cardiologist, said: "When we listened to his heart there's a murmur.
"We checked him with the echocardiogram that showed one of the valves is thickened.
"This would have gone unnoticed, but now we can get him into the system, get another scan and keep him under surveillance."
More than 500 people were screened at the clinic with about 50 having a heart issue detected.
Josephine Feeney, who was told her chest sounded normal, said it was important for her to get checked "for my peace of mind".
The 68-year-old told the BBC: "It's a great service and a good idea to bring the service to people."
