Active clinical trials for "Coronary Artery Disease"

The study is designed to see if stress echocardiography can be used as a screening exam in peri-, or post-menopausal women with a risk of developing of coronary artery disease and experiencing future cardiac events.

Treatment for no-option heart patients with coronary artery disease. Procedure includes the injection into the heart of a protein growth factor, administered by the Biological Delivery Systems MyoStar injection and mapping catheters, to stimulate the growth of blood vessels around blocked coronary arteries.

The hypothesis in this study was that ticagrelor switched to 60 mg after 1 month of standard dose, with antiplatelet activity that is not inferior to the standard dose and better than 75 mg clopidogrel for patients with ACS after PCI.

The investigators hypothesized that clopidogrel mono-therapy will not be inferior to the extended DAPT in terms of the occurrence of both ischemic and bleeding events, for lesions or patients at high risk for either ischemic or bleeding complications 12 months after drug-eluting stent (DES) implantation.

The primary purpose of this multi-center study is to collect and study the acoustic and electrical signals created by the heart during the cardiac cycle as a result of stenosis or plaque associated with coronary artery disease (CAD).

To place two different everolimus-eluting stents (EES), a bioabsorbable polymer EES (Synergy®) and a permanent-type polymer EES (Xience®), randomly to the ST-elevation acute myocardial infarction (AMI) and to observe and compare the early and chronic vascular responses using the frequency domain optical coherence tomography (FD-OCT). The primary endpoint is the 2-week strut coverage rate by FD-OCT.

Coronary artery bypass graft (CABG) surgery is a procedure where surgeons use blood vessels from elsewhere in the body to go around blockages or narrowings in the heart arteries. Before the surgery, the surgeon needs to choose which vessel will be used for the bypass, including potentially the radial artery in the wrist. Smartphones have been shown in a previous study to be a better way to assess the arteries in the hand than the traditional physical examination, as it is less subjective than simply watching the flushing of the hand. In this study, the investigators will assess the utility of a smartphone application in determining whether there is enough blood flow in the hand prior to using the radial artery for CABG surgery.

CFR has been studied for few years using 82 Rubidium PET (positron emission tomography) /CT. CFR has shown to be correlated with cardiovascular events occurring in the 10 following years. CFR also helps to identify multivessel coronary disease. Few studies have shown the possibility to calculate CFR during myocardial perfusion SPECT on new ultrafast CZT cameras.

All preoperative cardiac medications will be continued till the morning of the surgery, except angiotensin converting enzyme inhibitors. Patients will be pre-medicated with intramuscular morphine at 0.1 mg.kg-1 one hour before surgery. Upon arrival to the operating room, Initial monitoring included five lead electrocardiograms, non-invasive blood pressure, and pulse oximetry. At the attending anesthetists discretion, intravenous midazolam (0.05 mg/kg) will be administered for anxiolysis. Under local anesthesia an arterial line will be placed in the right radial artery and central venous line will be placed in the right internal jugular vein. Before induction of anesthesia for all study patients, Electrical cardiometry device (ICON; Cardiotonic, Osypka; Berlin, Germany) will be applied to the patient through 4 electrodes at the following sites: Below the left ear, Above the midpoint of the left clavicle, Left mid-axillary line at level of the xiphoid process and 5 cm inferior to the third electrode. Stroke volume variability (SVV) was measured while patient maintaining standard calm breathing at 8 breath/minute for one-minute. Patients with SVV less than 13% will be excluded from the study. Thus, all patients included will be considered fluid responders[5]. The baseline data in the form of heart rate, systolic, diastolic, and mean systemic arterial pressures, CO, CI, SV, SVI, SVV, SVR, and SVRI will be recorded during the study period in all the patients. Patients will then be randomly divided into two groups; control group will receive nothing before induction, while patients in volume loading group will receive volume loading of 8ml/kg Ringer acetate over 10 minutes. The volume loading will be repeated until SVV would be below 13%. The volume loading would be given by an anesthesia resident not involved in data collection. For induction, Patients in both groups will receive 3 mcg/kg of fentanyl. Then in all patients, propofol will be injected slowly at 1.5 mg/kg in 0.25 mg/kg increments every 20 s till clinical loss of consciousness. Clinical loss of consciousness (defined as no response to auditory command) will be assessed by asking the patients repeatedly every 20 s to open their eyes. After loss of consciousness, atracurium 0.5 mg/kg will be administered to facilitate tracheal intubation. The stress response to laryngoscopy and tracheal intubation is secondary to marked increase in sympathetic activity and manifested in general as tachycardia and hypertension and will be managed with increments 0..25mcg fentanyl. Hemodynamic changes; 20 beats/ minute or 20 mmHg difference in heart rate and blood pressure respectively were considered to be significant. Anesthesia will be maintained by isoflurane (1-1.2 %). Patients will be mechanically ventilated to have target of PO2 above 300mmhg and PCO2 between 35-40mmg. Any episode of hypotension (defined as mean arterial pressure [MAP] < 80% of the baseline reading and/or MAP <60 mmHg) will be managed by 5 mcg norepinephrine (which could be repeated if hypotension persists for 2 minutes). If bradycardia occurred (defined as heart rate less than 50 bpm), it will be managed by IV atropine bolus (0.5 mg). Hemodynamic data will be recorded 1-minte before the induction, 1-and 2-minutes after loss of consciousness, 1-minutes after intubation, then every 2-minutes for 15-minutes after intubation., the end point of the present study. Throughout this period the lungs will be mechanically ventilated with 50% air-oxygen mixture, to maintain an end-tidal carbon dioxide between 35 and 40 mmHg.

The aim of this study is to evaluate functional and physical capacity, health-related quality of life and associations with frailty in older patients after ischemic heart disease and interventional treatment with an individualized physical training program in the second phase of cardiac rehabilitation.