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Concept
Cardiac imaging
Résumé
Cardiac imaging refers to minimally invasive imaging of the heart using ultrasound, magnetic resonance imaging (MRI), computed tomography (CT), or nuclear medicine (NM) imaging with PET or SPECT. These cardiac techniques are otherwise referred to as echocardiography, Cardiac MRI, Cardiac CT, Cardiac PET and Cardiac SPECT including myocardial perfusion imaging.
A physician may recommend cardiac imaging to support a diagnosis of a heart condition.
Medical specialty professional organizations discourage the use of routine cardiac imaging during pre-operative assessment for patients about to undergo low or mid-risk non-cardiac surgery because the procedure carries risks and is unlikely to result in the change of a patient's management. Stress cardiac imaging is discouraged in the evaluation of patients without cardiac symptoms or in routine follow-ups.
Echocardiography is regularly utilized to diagnose, manage, and monitor patients with suspected or established heart ailments, making it a highly prevalent diagnostic imaging technique in cardiology due to its speed and efficiency.
Transthoracic echocardiography (TTE) uses ultrasonic waves for continuous heart chamber and blood movement visualization. It is the most commonly used imaging tool for diagnosing heart problems, as it allows non-invasive visualization of the heart and the blood flow through the heart, using a technique known as Doppler.
TTE is commonly used to evaluate patients with coronary artery disease. Stress echocardiography is used to diagnose coronary artery disease and assess myocardial viability.
Transesophageal echocardiography is an invasive procedure that involves inserting a flexible probe with an ultrasound transducer into the esophagus, providing closer access to the heart and surrounding structures. This procedure allows for better imaging of the aorta, pulmonary artery, heart valves, atria, atrial septum, left atrial appendage, and coronary arteries. It can also be used during cardiac surgery to monitor the patient and assess the success of surgical interventions.
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