11 1306

Cited 0 times in

관상동맥이 완전폐쇄된 환자에서 측부순환의 기능적 역할

Other Titles
 Functional significance of collateral circulation in patients with total coronary occlusion 
Authors
 하종원 
Issue Date
1993
Description
의학과/석사
Abstract
[한글]

관상동맥의 측부순환의 역할에 관하여서는 그동안 많은 논란이 있어왔으며 그 이유로는 그동안의 연구에서의 연구대상의 동질성에 문제가 있었던 것으로 생각된다. 관상동맥의 완전 폐쇄에도 불구하고 많은 수의 관상동맥환자에서 측부순환의 발달로 인하여 심근의

혀혈성 손상이 방지되는 것을 종종 관찰할 수 있다. 급성 심근경색초기에 측부순환의 존재는 심근경색의 크기를 줄이고 좌심실의 수축기능을 호전시킨다는 보고가 있으나 국내에서는 이에 대한 연구가 미진한 실정이다. 본 연구에서는 관동맥조영상 좌전하행관동맥이나 우관동맥중 한 개의 관동맥 완전폐쇄가 있었던 환자를 심근경색의 병력이 3개월미만인 심근경색환자군(79예)과 심근경색이 없었던 협심증 환자군(46예)으로 나누어 양군간의

측부순환의 발달정도에 따른 임상적 및 좌심실 기능의 차이를 조사하였고 심근경색환자군에서는 심근경색후 시간경과에 따른 측부순환의 발달정도를 분석하였다.

측부순환의 발달정도는 0에서 3까지로 나누어 0: 측부순환이 혈관조영상 관찰되지 않는 경우, 1: 측부순환이 폐쇄된 관동맥 분지에 부분적으로 관찰되는 경우, 2: 측부순환이 폐쇄된 관동맥주간지에 부분적으로 관찰되는 경우, 3: 측부순환이 폐쇄된 관동맥주간지전

체에서 관찰되는 경우로 하였으며 측부순환의 발달정도가 0과 1인 환자를 측부순환의 발달정도가 불량한 군으로, 측부순환의 발달정도가 2와 3인 환자군을 측부순환의 발달정도가 좋은 군으로 정의하였다. 좌심실의 벽운동장애정도는 30 우전사워좌심실조영상 anterobasal, anterolateral, apical, diaphragmatic alc posterobasal로 5개의 부분으로 나누어 각부분의 운동을 1부터 5까지로 나누어 정상을 1, 경도의 운동장애를 2, 심한 운동장애 3, 무운동 4 그리고 이상운동을 5로 하여 각 부분의 운동장애를 점수화하여 좌심실의 운동자애를 나타내었다.

협심증환자군에서 심근경색환자군에 비해 측부순환의 발달정도가 좋았으며(측부순환의 발달정도: 2.2±0.8 대 1.5±1.0, p<0.05) 다혈관 질환의 빈도가 높았다(54% 대 30%, p<0.05), 관상동맥의 완전폐쇄에도 불구하고 협심증환자군중 61%에서 안정시 심전도 소견이

정상이었으며 이 중 운동부하검사를 시행한 8명중 1예에서만 잘 발달된 측부순환이 관찰되었으며 시간경과에 따른 잘 발달된 측부순환의 빈도는 1일이내, 2주이내 및 2주이후에서 각각 13%, 54%, 60%로서 심근경색 초기에는 측부순환의 발달 정도가 미미하였으나 시

간이 지남에 따라 발달하여 심근경색 초기에는 측부순환의 발달정도가 미미하였으나 시간이 지남에 따라 발달하여 심근경색 2주후에는 많은 환자에서 관찰이 가능하였다. 심근경색환자군에서 측부순환의 발달정도가 좋은 환자군과 좋지 않은 환자군간에 좌심실구혈을,

좌심실확장말기압 및 벽운동지수에 의의있는 차이가 없었다. 잘 발달된 측부순환은 좌전하행관동맥 폐쇄시(36%)보다 우관동맥의 폐쇄시(64%) 더 많이 관찰되었다(p<0.05)

이상의 결과로 측부순환은 협심증환자에서 안정시 심근허혈의 방지에 도움을 주었으나 운동시 심근허혈을 방지하지는 못하였다. 심근경색환자군에서 심근경색초기에 잘 발달된 측부순환의 빈도가 적고 측부순환의 발달정도에 따른 좌심실 기능에 의의있는 차이가 없

는 점으로 미루어 측부순환이 심근경색환자에서 심근기능의 유지에는 큰 도움을 주지 못하였다.





Functional significance of collateral circulation in patients with total

coronary occluslon



Jong-Won Ha

Department of Medical Science Graduate School Yonsei University

(Directed by Professor Seung Yun Cho)



The functional significance of collateral circulation was evaluated in 125

patients with total coronary occlusion. Patients were classified into two groups.

Group 1:Patlents with angina pectoris(AP), Group 2:patients, with a first

transmural myocardial infarction(MI) within 3 months of symptom onset. Cl inical

variables, resting and exercise electrocardiogram(EKG) were analyzed with

angiographic findings. Collateral fillings were graded from 0 to 3: 0=none:

1=filling of side branches only: 2=partia1 falling of the epicardial segment:

3=complete filling of epicardial segment. The wall motion of each segment was

scored from 1 to 5: 1=norlal: 2=mi1d to moderate hypokinesia: 3=severe hypokinesia:

4=akinesia: 5=dyskinesia. The score of the 5 segments were added to yield a total

LV score. There is a higher prevalence of good collaterals and multivessel disease

in patients with AP than in those with MI(83% vs 53%, 54% vs 30%, respectively,

p<0.05). The left ventricular ejection fraction(LVEF), left ventricular

end-diastolic pressure(LVEDP) and segmental wall motion score were significantly

better in AP patients than those of MI(68.9±13.4%, vs 50.5±12.6%, 15.0±7.3 vs

20.3±8.8mmHg, 6.5±2.2 vs 9.6±2.3, respectively, p<0.05).In spite of total

coronary occlusion, 61% of AP patients had normal resting EKG but 96% of patients

who underwent treadmill test proved to be positive.

The proportion of well-developed collaterals in 3 groups divided according to the

interval between onset of MI and angiography(within 1day, 2 to 14days, 15days to 3

months) were 13%,54% and 60%. There were no significant difference in LIEF, LVEDP

and segmental wall motion score in MI patients with poorly-developed collaterals

and well-developed collaterals(49.1±15.7 vs 40.4±10.1%, 11.1±2.2 vs 10.9±l.4

and 24.3±9.7 vs 20.3±7.0mmHg, p=NS). The degree of collateral development is

higher in MI with right coronary artery occlusion compared with that of left

anterior descending artery occlusion(1.1±1.0 vs 2.0±1.0, p<0.05).

In conclusion, Collateral circulation can prevent myocardial ischemia and

preserve myocardial function in a significant number of patients with AP but do not

provide protection against exercise-induced myocardial ischemia in a majority of

patients with AP. Well-developed collaterala are uncommonly present within 1 day

after MI, but subsequently develop and are generally demonstrable after 2 weeks.

Collateral vessels in patients with MI have no beneficial effects on preserving

myocardial function.

[영문]

The functional significance of collateral circulation was evaluated in 125 patients with total coronary occlusion. Patients were classified into two groups.

Group 1:Patlents with angina pectoris(AP), Group 2:patients, with a first transmural myocardial infarction(MI) within 3 months of symptom onset. Cl inical variables, resting and exercise electrocardiogram(EKG) were analyzed with angiographic findings. Collateral fillings were graded from 0 to 3: 0=none: 1=filling of side branches only: 2=partia1 falling of the epicardial segment:

3=complete filling of epicardial segment. The wall motion of each segment was scored from 1 to 5: 1=norlal: 2=mi1d to moderate hypokinesia: 3=severe hypokinesia: 4=akinesia: 5=dyskinesia. The score of the 5 segments were added to yield a total LV score. There is a higher prevalence of good collaterals and multivessel disease in patients with AP than in those with MI(83% vs 53%, 54% vs 30%, respectively, p<0.05). The left ventricular ejection fraction(LVEF), left ventricular end-diastolic pressure(LVEDP) and segmental wall motion score were significantly better in AP patients than those of MI(68.9±13.4%, vs 50.5±12.6%, 15.0±7.3 vs 20.3±8.8mmHg, 6.5±2.2 vs 9.6±2.3, respectively, p<0.05).In spite of total coronary occlusion, 61% of AP patients had normal resting EKG but 96% of patients who underwent treadmill test proved to be positive.

The proportion of well-developed collaterals in 3 groups divided according to the interval between onset of MI and angiography(within 1day, 2 to 14days, 15days to 3 months) were 13%,54% and 60%. There were no significant difference in LIEF, LVEDP and segmental wall motion score in MI patients with poorly-developed collaterals and well-developed collaterals(49.1±15.7 vs 40.4±10.1%, 11.1±2.2 vs 10.9±l.4 and 24.3±9.7 vs 20.3±7.0mmHg, p=NS). The degree of collateral development is

higher in MI with right coronary artery occlusion compared with that of left anterior descending artery occlusion(1.1±1.0 vs 2.0±1.0, p<0.05).

In conclusion, Collateral circulation can prevent myocardial ischemia and preserve myocardial function in a significant number of patients with AP but do not provide protection against exercise-induced myocardial ischemia in a majority of patients with AP. Well-developed collaterala are uncommonly present within 1 day after MI, but subsequently develop and are generally demonstrable after 2 weeks. Collateral vessels in patients with MI have no beneficial effects on preserving myocardial function.
Full Text
https://ymlib.yonsei.ac.kr/catalog/search/book-detail/?cid=CAT000000004330
Files in This Item:
제한공개 원문입니다.
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 2. Thesis
Yonsei Authors
Ha, Jong Won(하종원) ORCID logo https://orcid.org/0000-0002-8260-2958
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/117291
사서에게 알리기
  feedback

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse

Links