Usefulness of MRI to Demonstrate the Mechanisms of Myocardial Ischemia in Hypertrophic Cardiomyopathy with Myocardial Bridge

Abstract

We present a case of symptomatic primary hypertrophic cardiomyopathy (HCM) associated with myocardial bridging of the left anterior descending (LAD) artery and suspected ischemia that could be related either to LAD artery compression or to microvascular perfusion abnormalities. MRI demonstrated the morphological appearance of myocardial hypertrophy, and coronary MR angiography evidenced the myocardial bridge and its functional consequences with stress MR perfusion. In conclusion, as a non-invasive comprehensive imaging technique, MRI should be considered in identifying the mechanisms of myocardial ischemia in HCM with myocardial bridge.

Evolution of Microstructure and Microchemistry in Cold-worked 316 Stainless Steels under PWR Irradiation

“…12, together with the literature data in which irradiation temperature was below 623 K. 8,11,[21][22][23][24][25][26][27] A high density of fine bubbles similar to the present study was reported in HFIR and ATR irradiations. 22,23) In these data the diameter and number density were <3 nm and in the order of 10 23 m À3 , respectively. A common condition between these data and the present data appeared to be high helium generation.…”

“…[21][22][23] These were identified in all the irradiation conditions whereas no void was observed. The difference of 30 K (565 vs. 595 K in samples C vs. D and G vs. H) in similar dose and dose rate condition caused no notable changes in cavity morphology.…”

Incidence and clinical significance of myocardial bridging with ECG-gated 16-row MDCT coronary angiography

“…MDCT coronary angiography has been accepted for the noninvasive imaging technique of choice for the diagnosis of myocardial bridging. Other non-invasive imaging techniques for assessing ischemia, such as dobutamine magnetic resonance imaging (MRI), MRI stress perfusion, and myocardial perfusion SPECT may be helpful in the functional assessment of the significance of myocardial bridging [22][23][24].…”

Myocardial Bridging: Two Different Clinical Presentations in Young Males Involving Left Anterior Descending Coronary Artery

“…Recent advances in cardiac imaging with cardiac CT, cardiac MRI, can also be used in making the diagnosis [ 19 , 20 ]. Cardiac CT is an alternative for patients with a low pretest probability for coronary atherosclerosis.…”