Coronary microvascular disorder

This trial tests whether dapagliflozin, a drug used for diabetes, can improve blood flow in the tiny vessels of the heart in people with angina (chest pain) but no blocked coronary arteries. Participants will take either dapagliflozin or a placebo daily for 180 days. The study me…

This trial explores whether starting transdermal estradiol (a skin gel or patch) soon after menopause can protect the heart and brain in women who have hot flashes and at least one cardiovascular risk factor. One hundred women will be randomly assigned to receive the hormone ther…

This study tests a simple balloon inflation technique to modify blood clots during emergency heart artery opening. 100 heart attack patients will either get the balloon procedure or standard care. The goal is to see if this reduces damage to the heart muscle and improves recovery…

This study tests a new approach for women with chest pain who don't have blocked arteries. Doctors will use special tests to find the exact cause of the pain, then give each woman a personalized treatment plan. The goal is to see if this tailored approach improves symptoms and qu…

This study compares 1 month versus the standard 6 months of dual antiplatelet therapy (two blood thinners) in people who had a balloon procedure for small coronary artery disease. About 1,484 adults with stable angina or silent ischemia will be randomly assigned to either short o…

This phase 2 trial tests whether quercetin, a dietary supplement found in many fruits and vegetables, can improve the function of tiny blood vessels in young adults with obesity. Forty participants will take either quercetin or a placebo daily for 30 days. Researchers will measur…

This study is for people who have chest pain and shortness of breath but no blockages in their main heart arteries. The likely cause is a problem with the heart's tiny blood vessels, called coronary microvascular dysfunction (CMD). The study will test treatments tailored to how e…

This study tests whether a noninvasive skin test can accurately diagnose microvascular heart problems in women who have chest pain but clear major arteries. Researchers will compare skin blood vessel function with invasive heart measurements in 60 women. If the skin test works, i…

This study looks at whether a non-invasive ultrasound of the heart can diagnose blood vessel problems in people with chest pain but no blocked arteries. About 35 patients who previously had an invasive heart test will get an ultrasound instead. The goal is to see if the ultrasoun…

This study looks at a new method to diagnose problems in the small blood vessels of the heart in people who have chest pain but no blockages in their main arteries. Researchers will test if the procedure is safe, reliable, and can be done consistently. About 100 adults will take …

This trial tests whether an 8-week daily resistance exercise program can reduce chest pain and improve daily function in women who have angina without blocked coronary arteries (ANOCA). Around 76 to 152 women across 13 hospitals in the UK and Netherlands will be randomly assigned…

This study looks at whether tiny plastic particles in the blood are linked to problems with the heart's small blood vessels. Researchers will measure microplastic levels in 184 people who are already having a heart procedure, and then check their heart vessel function and track t…

This study will test a new, noninvasive camera called XyCAM CRE that measures blood flow in the back of the eye. Researchers will compare its images with standard eye tests in 350 adults with retinal disorders. The goal is to see if this camera can provide extra information to he…

This study looks at whether Guanxinning tablets can help repair tiny blood vessels in the heart after a heart attack. About 70 people who have had a severe heart attack will take the tablets or a placebo for 6 months. The main goal is to see if the tablets reduce bleeding in the …

This study looks at whether adding a special heart function test (coronary function testing) to the standard artery-opening procedure (angioplasty) can better relieve chest pain and improve quality of life. About 450 adults with a significant blockage in a major heart artery will…

This study aims to see if long-term, low-dose radiation exposure at work can cause early damage to small blood vessels in healthcare workers. Researchers will use a simple microscope test on the fingernail area and blood tests to look for signs of vessel and inflammation changes.…

This study looks at how low oxygen levels during sleep (from obstructive sleep apnea) are connected to problems in the tiny blood vessels of the heart. Researchers will follow 560 adults with suspected heart issues to see if sleep apnea patterns can predict future heart events li…