Coronary stenosis

This trial tests whether a new device called SynFlow 3.0 can safely support the heart during high-risk angioplasty (a procedure to open blocked coronary arteries) as well as the standard VA-ECMO device. About 222 people with severe coronary artery disease and a weakened heart (ej…

This pilot study tests a new type of stent—a drug-coated, spur-shaped device—as a primary treatment for in-stent restenosis, where a previously placed coronary artery narrows again. The trial enrolls up to 9 adults with this condition to see if the device is safe in the short ter…

This study compares three common heart medications (nicorandil, diltiazem, and isosorbide mononitrate) to see which best prevents the narrowing or failure of radial artery grafts used in coronary artery bypass surgery. About 150 adults who recently had bypass surgery will take on…

This study tested whether using ultrasound inside the heart arteries (IVUS) to guide stent placement works better than standard X-ray guidance for people with a blockage in the left main coronary artery. About 800 patients were randomly assigned to one of the two methods and foll…

This study looked at 108 people whose heart stents had narrowed again after being placed. Doctors tested three different devices: two types of drug-coated balloons and one new stent. The goal was to see which one works best to keep the artery open and prevent future heart problem…

This study tested a special balloon coated with the drug everolimus in 51 people whose previously placed heart stents had become blocked again. The balloon is inflated inside the artery to deliver the drug directly to the blockage, aiming to keep the artery open. The main goals w…

This study looked at 1,500 people with severe blockages in three heart arteries. It compared a less invasive procedure using a pressure wire to guide stent placement (FFR-guided PCI) with open-heart bypass surgery (CABG). The goal was to see if the stent approach could match the …

This study tested a new balloon catheter called SINOMED CBC for treating narrowed coronary arteries. It involved 136 patients with stable or unstable angina or evidence of heart muscle ischemia. The device was compared to a standard balloon catheter to see if it was as safe and e…

This study looked at how well the Xience Sierra drug-coated stent works in a broad group of heart disease patients, including those with diabetes or prediabetes. Over 1,700 participants received the stent during a routine procedure to open blocked arteries. Researchers tracked he…

This study looked at whether high-intensity breathing exercises (inspiratory muscle training) can improve blood vessel function and artery stiffness in people with heart disease before they start cardiac rehab. Eleven adults who had heart surgery or related conditions took part. …

This study tested a special stent made of magnesium that slowly dissolves in the body. The stent releases a drug to prevent scarring and was used in 20 patients with complex blockages where arteries branch. The goal was to see if it is safe and works well for these tricky cases.

This study tested a special balloon coated with medication to reopen completely blocked heart arteries in 309 people. The balloon delivers drug to keep the artery open without leaving a permanent stent. Researchers checked if the artery stayed open and if there were any heart pro…

This study tested a virtual cardiac rehabilitation program using a smartphone app, a fitness wristband, and a blood pressure monitor for people who recently had a heart attack, heart surgery, or a stent. The goal was to see if this home-based program could improve walking ability…

This study tested a special balloon coated with sirolimus, a drug that helps prevent arteries from narrowing again after angioplasty. It included 110 adults with stable or unstable coronary artery disease who had long blockages (at least 25 mm) in their heart arteries. The main g…

This completed study tested whether a special ultrasound scan (IVUS) of plaque buildup in heart arteries can accurately diagnose reduced blood flow (functional myocardial ischemia). Researchers enrolled 105 adults with coronary artery disease and compared IVUS results to the stan…

This study tested a new software program that analyzes heart angiogram images to measure blood flow blockages without needing to insert a pressure wire into the artery. Researchers reviewed the records of 100 patients who had both an angiogram and an invasive pressure measurement…

This study tests whether giving a nerve block (stellate ganglion block) before coronary artery bypass grafting (CABG) can reduce the chance of developing atrial fibrillation, a common irregular heartbeat after surgery. About 60 adults having CABG will be randomly assigned to rece…

This study tested whether a parasternal block—an injection of the numbing drug ropivacaine into the chest wall—could reduce the amount of anesthetic needed to keep heart rate and blood pressure stable during coronary artery bypass surgery. Thirty-five patients were randomly assig…

This completed study looked at how much radiation people receive during heart CT scans (CCTA) in everyday hospital practice. Researchers enrolled 66 adults who needed a heart CT and recorded the radiation dose used, along with any dose-saving techniques. The goal was to understan…

This study aims to develop a computer model that can predict how well blood flows to the heart muscle during stress, using only a standard CT scan. Currently, this requires an additional scan and a drug to simulate stress. The researchers will analyze CT scans from 400 people wit…

This completed study looked at 1000 people who had a coronary stent placed to see if a score based on insulin resistance could predict whether the stent would narrow again (restenosis). Researchers measured insulin resistance using routine blood tests and checked for restenosis w…

This study looked at over 3,300 people having a heart procedure through the wrist artery. Doctors tested different types of introducers (the tube used to access the artery) to see if a smaller size or a special coating could lower the risk of problems like artery blockage or spas…

This study looked at whether using a heart ultrasound probe (TEE) during low-risk coronary artery bypass surgery should be done routinely or only when needed. Researchers enrolled 40 patients and checked if it was possible to randomly assign them to one of two groups. The goal is…

This study looked at data from 100 patients who had heart artery imaging and pressure measurements. Researchers developed a new computer algorithm to analyze ultrasound images of the arteries and estimate how much they block blood flow. The goal was to see if the algorithm could …

This study looked at how a nerve condition called cardiovascular autonomic neuropathy (CAN) affects the risk of kidney injury in people having heart bypass surgery. Researchers tracked 912 adults before, during, and after surgery to see if those with CAN had worse kidney function…

This study looked at 90 people with low or medium heart risk to see if tiny, non-blocking plaques in the heart arteries affect how blood clots and how blood vessels work. Participants had a special CT scan to find these small plaques, and their blood was tested for clotting activ…

This completed study looked at 160 people with coronary artery disease who needed a stent in one artery and also had a partial blockage in another. Researchers measured pressure in the second blockage before and after stenting the first, to see if treatment changed the reading. T…

This study compared radiation exposure to doctors during heart procedures (coronary angiography and stenting) using two different arm artery approaches: the left distal radial artery and the conventional right radial artery. Over 1,000 patients participated. The goal was to see i…

This study involved 150 people with completely blocked heart arteries who had a special procedure called STAR. Researchers wanted to find the best time to place a stent afterward—either 5-7 weeks or 12-14 weeks later. The goal was to see which timing leads to a more successful st…

This study used cardiac CT scans to compare the amount of high-risk plaque in the coronary arteries of 480 people with and without a family history of coronary artery disease. All participants had no prior heart problems. The goal was to see if those with a family history have mo…