Two Cases of Myocardial Bridge Associated with Myocardial Ischemia

Amitani, Kenichi; Yamaguchi, Taizo; Takahashi, Naoto; Uchida, Takahiro; Kushikata, Yoshifumi; Munakata, Kazuo; Masuda, Sadahiko; Orii, Tuneyasu; Iedokoro, Yoshio; Hioki, Masafumi; Yamamoto, Akira

doi:10.1272/jnms.67.206

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…The retardation of systolic flow by the decrease in the systolic flow/total flow ratio and an increase in diastolic flow was eliminated after the MB had been excised, suggesting a role of the MB in coronary blood flow. Myocardial bridges associated CA spasm, and the spasm induced by rapid atrial pacing was also reported (11,13,14, 18,26).…”

Section: Discussionmentioning

confidence: 92%

“…It will be severer, if the compressive force is extended into diastole and could result in the exaggeration of myocardial ischemia, angina pectoris, myocardial infarction and sudden cardiac arrest. It is known if MB grows and develops further in association with the development of heart disorders (11)(12)(13)(14)18,26).…”

Section: Discussionmentioning

confidence: 99%

“…The influence of MB on the blood flow through the CA under the bridges and the involvement of MB in various heart diseases, including the development of arteriosclerosis, myocardial ischaemia, myocardial infarction, angina pectoris and sudden ventricular fibrillation, have been discussed for years (11)(12)(13)(14)(15).…”

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confidence: 99%

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The investigation of perivasculary space under the myocardial bridge in different species

Özbağ

Kervancıoğlu

2004

International Journal of Clinical Practice

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Our purpose in this study was to investigate the perivasculary space under the myocardial bridges (MB) in dog, sheep, goat and human hearts. A total of 160 hearts were studied, and perivasculary space under the myocardial bridges was examined under microscope. The specimens belonged to 25 dogs, 100 sheep, 25 goats and 10 humans. Special attention was paid to evaluate the distance between the MB and coronary arteries (CA), CA and underlying myocardium (UM) and to find the relation of concomitant vein number accompanying the CA and MB. 219 myocardial bridges were found in total of hearts, and specimens from these bridges were examined under microscope. There were large variations in distance between the MB and CA (0-714 microm) and distance between CA and UM (0-309 microm). The myocardial bridges were classified into three groups in terms of the number of veins accompanying CA, the bridges with no concomitant veins with one concomitant vein and with two concomitant veins. This suggests that the distance between the MB and CA is crucial to determine how much force is on the CA. The environment surrounding the CA may be a crucial factor in determining whether the MB influences the induction of heart disorders or not.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

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The investigation of perivasculary space under the myocardial bridge in different species

Özbağ

Kervancıoğlu

2004

International Journal of Clinical Practice

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“…Approximately 80% of coronary perfusion occurs in diastole 11 . Although it was thought that systolic narrowing due to MB would not cause ischemia, MB can lead to angina pectoris, myocardial infarction, and even sudden death 12–14 . MB, a congenital coronary abnormality, is usually a benign condition.…”

Section: Discussionmentioning

confidence: 99%

Impaired Endothelial Function in Patients with Myocardial Bridge

et al. 2006

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“…Therefore, further efforts still need to be made to reveal the link between blood flow in the mural coronary artery and MB [13][14][15][16][17][18][19][20][21]. Designing of a simulative device of heart-mural coronary artery-myocardial bridge is of great significance as an addition to the clinical research.…”

Section: Introductionmentioning

confidence: 99%

Heart Pump System in “Heart—Mural coronary artery—Myocardial Bridge” Simulative Device

Ding

Chen

Shen

et al. 2009

Australas. Phys. Eng. Sci. Med.

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The myocardial tissue covering the artery is termed a myocardial bridge. But so far many researches on the myocardial bridge have been involved with clinical patients or animals, which have some limitations (e.g. lack of systematicness, difficulties in measuring the flow in the mural coronary artery and so on). Designing a "Heart-Mural coronary artery-Myocardial Bridge" Simulative Device provides a good approach to solve above problems; however, documents on this subject have seldom been reported until now. The heart pump as the key part of the whole simulative device should be able to simulate the waveform of blood pressure, adjust blood flow and regulate heart rate. Our experimental results basically met above requirements. The heart pump proposed in the paper presented an alternative experimental method to go further into other issues about the cardiovascular circulation system.

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Two Cases of Myocardial Bridge Associated with Myocardial Ischemia

Cited by 9 publications

References 3 publications

The investigation of perivasculary space under the myocardial bridge in different species

The investigation of perivasculary space under the myocardial bridge in different species

Impaired Endothelial Function in Patients with Myocardial Bridge

Heart Pump System in “Heart—Mural coronary artery—Myocardial Bridge” Simulative Device

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