Investigation and review of myocardial bridges in adult cadaver hearts and angiographs

Abstract

The presence of MB, MBL and degree of luminal narrowing were not associated with the age and gender. Deepness and thickness were a major determinant of significancy of systolic obstruction by MBs.

Myocardial bridge and coronary arteries: morphological study and clinical significance

“…These findings were in accordance with the results stated in literature [5,12,26,28]. According to the results of previous literature, the second common location of the MB was the diagonal branches of AIA and PIA branch of RCA (13.8%, each) [5].…”

“…However, Fazliogullari et al [12] In accordance with the results of previous cadaveric studies in Colombian [5] and Kenyan [28] populations, the result of present study revealed higher incidence of MB in male hearts (72.2%) than those of female hearts (27.8%), with no significant statistical difference. However, a female predominance was reported by Konen et al [18].…”

“…In agreement with the results of the present study, MB were noted in 40.3% and 40.4% of their specimens respectively [5,28]. However, a higher incidence of MB (64%, 56%, 55.6% and 52%) was reported in literature [6,12]. Moreover, a significance discrepancy was reported between cadaveric and angiographic studies regarding the incidence, frequency and prevalence of MB, where in cadaveric studies, the range of MB incidence was 5-86%, while in the angiographic studies, the occurrence of MB ranged from 0.5% to 33% [4,19,26].…”

“…According to the results of previous literature, the second common location of the MB was the diagonal branches of AIA and PIA branch of RCA (13.8%, each) [5]. However, a lower incidence of MB was reported over DA and PIA branches [12,28]. The actual cause of higher incidence of the MB over middle third of the AIA remains unclear [6].…”

“…The cases in which the RCA gives off the PIA and the left circumflex gives off the posterolateral branches were referred to as having balanced circulation. However, there are other patterns that do not fit into this classification [12,20]. Right dominant circulation is the commonest in 42-87% of the general population, while left dominant circulation for general population is 10-24% and the co-dominance (balanced) circulation is 3-44% [12,20,27].…”