Mayo Clinic Study: Fast CT Is Quick, Accurate Way To Detect Heart Disease In ER Patients With Chest Pain

March 11, 1999

ROCHESTER, MINN. -- A Mayo Clinic study published in Annals of Emergency Medicine finds electron-beam computed tomography (EBCT), a type of CAT scan, quickly detects coronary artery calcification in emergency room patients with chest pain. If the scan shows no calcification, the patient is at low risk of having a heart attack.

"A negative EBCT allows doctors to safely send patients home without further observation in a chest pain unit or admittance to the hospital," says Dr. Dennis Laudon, chief investigator of the study. "According to study findings, EBCT is an efficient, cost-effective screening tool for patients with chest pain, normal initial test results and no history of coronary artery disease.

"Determining the cause of chest pain in ER patients is often difficult," adds Dr. Laudon. "Until this point there hasn't been an effective test to tell us if the heart is involved or if the pain is caused by something else. Now we can safely send patients home without admitting them to a chest pain unit for further tests and observation. And that saves the patients worry, time and money."

More than 5 million people with chest pain are admitted to emergency departments each year. Of those patients, 1.5 million actually suffer a heart attack or have angina, a condition in which the heart muscle does not get an adequate supply of blood or oxygen.

"Doctors often recommend hospital admission for patients whose cause of chest pain is unclear," Dr. Laudon notes. "This practice results in an estimated cost of $10 billion to $13 billion per year. Our study shows EBCT, a $420 test that takes a frozen image of the heart, can tell doctors whether or not patients are at acute risk for heart attack."

Researchers studied 105 patients admitted to the emergency department from December 1995 to October 1997. All participants underwent EBCT tests. Of those patients, 100 had additional standard evaluations, including combinations of treadmill exercise tests, coronary angiography, radionuclide testing and echocardiography. Results of EBCT were negative for 53 of the 100 patients. The negative findings remained the same during a four-month follow-up period.

"For the subset of chest pain patients whose blood tests and electrocardiographs are normal, a negative EBCT test can tell us we can send them home," Dr. Laudon says. "The test is 20 times faster than a normal CAT scan, and it is noninvasive -- no needle, no oral contrast materials. The only risk to the patient is a small dose of radiation similar to that of a conventional chest CT scan."

Dr. Laudon says a larger scale study is needed to confirm results. EBCT is available at a few sites in the midwest, including Mayo Clinic, Iowa City and Madison, Wis.
-end-


Mayo Clinic

Related Heart Attack Articles from Brightsurf:

Top Science Tip Sheet on heart failure, heart muscle cells, heart attack and atrial fibrillation results
Newly discovered pathway may have potential for treating heart failure - New research model helps predict heart muscle cells' impact on heart function after injury - New mass spectrometry approach generates libraries of glycans in human heart tissue - Understanding heart damage after heart attack and treatment may provide clues for prevention - Understanding atrial fibrillation's effects on heart cells may help find treatments - New research may lead to therapy for heart failure caused by ICI cancer medication

Molecular imaging identifies link between heart and kidney inflammation after heart attack
Whole body positron emission tomography (PET) has, for the first time, illustrated the existence of inter-organ communication between the heart and kidneys via the immune system following acute myocardial infarction.

Muscle protein abundant in the heart plays key role in blood clotting during heart attack
A prevalent heart protein known as cardiac myosin, which is released into the body when a person suffers a heart attack, can cause blood to thicken or clot--worsening damage to heart tissue, a new study shows.

New target identified for repairing the heart after heart attack
An immune cell is shown for the first time to be involved in creating the scar that repairs the heart after damage.

Heart cells respond to heart attack and increase the chance of survival
The heart of humans and mice does not completely recover after a heart attack.

A simple method to improve heart-attack repair using stem cell-derived heart muscle cells
The heart cannot regenerate muscle after a heart attack, and this can lead to lethal heart failure.

Mount Sinai discovers placental stem cells that can regenerate heart after heart attack
Study identifies new stem cell type that can significantly improve cardiac function.

Fixing a broken heart: Exploring new ways to heal damage after a heart attack
The days immediately following a heart attack are critical for survivors' longevity and long-term healing of tissue.

Heart patch could limit muscle damage in heart attack aftermath
Guided by computer simulations, an international team of researchers has developed an adhesive patch that can provide support for damaged heart tissue, potentially reducing the stretching of heart muscle that's common after a heart attack.

How the heart sends an SOS signal to bone marrow cells after a heart attack
Exosomes are key to the SOS signal that the heart muscle sends out after a heart attack.

Read More: Heart Attack News and Heart Attack Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.