Intracerebral Regional and Vasculature-Specific Distributions of Ischemic Cerebrovascular Diseases: Using MRI and MRA

The purpose of this study was to utilize Magnetic Resonance Imaging (MRI) and Magnetic Resonance Angiography (MRA) to analyze intracerebral regional distributions (hot spot) of ischemic cerebrovascular diseases which were characterized by stenosis and occlusion cerebral vasculature, except for cerebrovascular diseases induced by rupture of cerebral vasculature in terms of Korean people's cerebrovascular diseases, so that it could apply the findings of analysis to clinical practices. This study focused only on analyzing intracerebral regional distributions of ischemic cerebrovascular diseases that are characterized by stenosis and occlusion cerebral vasculature, because there are different etiologic mechanisms of ischemic cerebrovascular diseases like hemorrhagic cerebrovascular diseases (caused by rupture of cerebral vasculature) and cerebral infarction (induced by atheromatous arteriosclerosis). As a result, this study could come to the following findings of analysis: 1. According to sex ratio analysis, it was found that male group comprised larger portion of total 626 subjects in this study than female one (55.0% > 45.0%). 2. According to analysis on actual intracerebral regional distributions of ischemic cerebrovascular diseases, it was found that most subjects (37.5 %) were attacked by such diseases on the right side of cerebral vasculature, which was followed by left side of cerebral vasculature (35.1%) and bilateral cerebral vasculature (27.3%) respectively. 3. According to analysis on actual intracerebral regional distributions of ischemic cerebrovascular diseases, it was found that internal carotid artery (ICA) comprised the largest portion (38.9%) of those distributions, which was followed by middle cerebral artery (MCA, 35.7%), posterior cerebral artery (PCA, 13.4%), anterior cerebral artery (ACA, 6.0%) and vertebral artery (VA, 3.3%) respectively. 4. It was found that there was no subject attacked by any disease on A-com region, and there was only one male subject attacked by cerebrovascular diseases on P-com region. 5. It was found that female group was more susceptible to the attack of cerebrovascular diseases on MCA region than male one (54.6% > 42.2%), which means significant differences depending upon sex on statistical basis ($x^2$ = 9.64, p < .01). 6. It was found that male group was more susceptible to the attack of cerebrovascular diseases on ICA region (56.4% > 46.8%), which means significant differences depending upon sex on statistical basis ($x^2$ = 5.71, p < .05). 7. Moreover, it was also found that male group was more susceptible to the attack of cerebrovascular diseases on BA region (2.3% > 0.4%), which means significant differences depending upon sex on statistical basis ($x^2$ = 4.25, p < .05). 8. However, it was found that there was not any significant difference in intracerebral vasculature-specific distributions of cerebrovascular diseases depending on age of subjects, and stenosis comprised larger portion of cerebrovascular diseases than occlusion.

MRI와 MRA를 이용한 허혈성 뇌혈관 질환의 뇌혈관별 분포에 대한 연구

본 연구에서는 MRI와 MRA를 이용하여 우리나라 사람의 뇌혈관 질환 중 뇌혈관의 파열에 의한 뇌혈관 질환을 제외하고 뇌혈관이 좁아지거나 막힌 허혈성 뇌혈관 질환의 분포(호발부위)를 분석하여 임상에서 활용할 수 있도록 하였다. 뇌혈관이 좁아지거나 막힌 허혈성 뇌혈관 질환만의 분포를 분석한 이유는 뇌혈관의 파열에 의한 출혈성 뇌혈관 질환과 뇌경색(brain infarction) 등 허혈성 뇌혈관 질환의 발생학적 기전(mechanism)이 다르기 때문이며 그 결과는 아래와 같다. 1. 연구대상자 총 626명 중 성별로는 남자가 55.0%로 여자 45.0%보다 높은 분포를 보였다. 2. 위치별 허혈성 뇌혈관 질환의 분포에서 우측 뇌혈관이 37.5%로 가장 많았으며, 좌측 뇌혈관 35.1%, 양쪽 뇌혈관 27.3% 순으로 나타났다. 3. 허혈성 뇌혈관 질환의 뇌혈관 별 분포는 ICA가 38.9%로 가장 많았으며, 다음으로 MCA 35.7%, PCA 13.4%, ACA 6.0%, VA 3.3% 순으로 나타났다. 4. A-com에 질환이 있는 경우는 한 명도 없었으며 P-com 에도 남자 1명만이 발생했다. 5. MCA에는 여자가 54.6%로 남자 42.2%보다 많아, 성별에 따라 통계적으로 유의미한 차이를 보였다($x^2$=9.64, p < .01). 6. ICA에서는 남자가 56.4%로 여자 46.8%보다 많아 통계적으로 유의미한 차이를 보였다($x^2$=5.71, p < .05). 7. BA에서도 남자가 2.3%로 여자 0.4%보다 많아 성별에 따라 유의미한 차이를 보였다($x^2$=4.25, p < .05). 8. 연령에 따른 혈관별 질환의 분포에 대한 차이는 없었으며 협착과 폐색의 분포에서는 폐색보다 협착이 많았다.