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Gated MR imaging of the heart: intracardiac signals in patients and healthy subjects
- Source :
- Radiology. 156:125-132
- Publication Year :
- 1985
- Publisher :
- Radiological Society of North America (RSNA), 1985.
-
Abstract
- The appearance of intraluminal signal in the cardiac chambers, the descending aorta, and blood vessels was studied in healthy subjects and patients with myocardial disease on first and second spin-echo gated magnetic resonance images. Signal was present in the cardiac chambers and the aorta at various phases of the cardiac cycle when physiological or pathological slow flow conditions are expected in healthy subjects and in patients. Healthy individuals tended to show signal in the ventricles and aorta during end-diastole, and signal was less likely to be present at higher heart rates and in systolic images. In patients with regional or global left ventricular dysfunction, intraventricular signal tended to persist into systole. Surprisingly, intraventricular signal was not present with increased frequency adjacent to infarcted regions of the myocardial wall. Thus, the mere presence of intracavitary signal cannot be used as an indicator of either regional or global cardiac contraction abnormalities. In the left atrium, signal was often present during systole. Physical factors determining the appearance of signal of flowing blood are discussed in an Appendix.
- Subjects :
- Adult
Cardiomyopathy, Dilated
medicine.medical_specialty
Magnetic Resonance Spectroscopy
Myocardial Infarction
Aorta, Thoracic
Coronary circulation
Heart Rate
Coronary Circulation
medicine.artery
Internal medicine
medicine
Humans
Thoracic aorta
Radiology, Nuclear Medicine and imaging
Prospective Studies
Myocardial infarction
Systole
Aged
Heart Failure
Aorta
Cardiac cycle
business.industry
Heart
Middle Aged
medicine.disease
Myocardial Contraction
medicine.anatomical_structure
Heart failure
Descending aorta
cardiovascular system
Cardiology
Radiology
business
Blood Flow Velocity
Subjects
Details
- ISSN :
- 15271315 and 00338419
- Volume :
- 156
- Database :
- OpenAIRE
- Journal :
- Radiology
- Accession number :
- edsair.doi.dedup.....462cddcfa814823014b40f8d1ab3c69c