Hemodynamic factors of thrombus formation in coronary aneurysms associated with Kawasaki disease

BACKGROUND: We studied the mechanism of thrombus formation in coronary aneurysms based on rheological findings. METHODS: We studied 43 coronary aneurysms in 33 patients with Kawasaki disease (mean (+/- SD) age 6.1 +/- 4.3 years). These lesions were divided into three groups on the basis of maximum diameter: (i) small (group S); (ii) medium sized (group M); and (iii) large (group L) aneurysms. Using a Doppler flow guidewire and a pressure-monitoring guidewire, we measured coronary flow velocity and perfusion pressure inside aneurysms and in adjacent normal-looking vessels. We calculated the average peak velocity (APV) index, the mean coronary perfusion pressure (P) index and shear index. RESULTS: The APV index and shear index decreased significantly (p < 0.005) as the aneurysm size increased (APV index in groups S, M and L was 0.893 +/- 0.149, 0.573 +/- 0.242 and 0.128 +/- 0.131, respectively; shear index in groups S, M and L was 0.750 +/- 0.149, 0.328 +/- 0.153 and 0.020 +/- 0.028, respectively). However, coronary perfusion pressure showed no relationship to aneurysm size and was not significantly different from that in adjacent normal-looking vessels. CONCLUSIONS: The results of the present study suggest that the stagnation of flow and the reduction of shear stress in coronary aneurysms could initiate thrombus formation.     

Competition Between Native Flow and Graft Flow After Coronary Artery Bypass Grafting. Impact on Indications for Coronary Artery Bypass Grafting for Localized Stenosis with Giant Aneurysms Due to Kawasaki Disease

We report the postoperative course of native and graft flow after coronary artery bypass grafting (CABG) in two patients with giant aneurysms and localized stenosis due to Kawasaki disease (KD). Although both patients had undergone CABG to the left anterior descending artery (LAD) with the left internal thoracic artery (ITA), at 5 and 10 years old, respectively, the ITA grafts were occluded 1 month postsurgery. However, when the two patients suffered complete occlusion of the native LAD more than 10 years after surgery, angiograms showed that the ITA grafts had reopened. We believe that this postoperative course reflects competition between the native artery flow and graft flow after CABG. CABG in patients with severely delayed coronary flows or recurrence of thrombus in giant aneurysms was ineffective in preventing myocardial infarction or damage. We conclude that CABG in giant aneurysm without significant localized stenosis should be avoided.     

广州市儿童医院2001至2004年川崎病患儿冠状动脉损害的特点及随访

目的 探讨广州市儿童医院2001至2004年川崎病（KD）患儿冠状动脉损害的发生及恢复期变化特点。方法 采用彩色多普勒超声心动图检查广州市儿童医院收治的KD患儿，对伴冠状动脉损害者进行随访，KD 患儿恢复期接受三磷腺苷负荷超声心动图检查。按急性期冠状动脉扩张的程度，将KD患儿分为冠状动脉扩张组、中小型冠状动脉瘤组和巨大型冠状动脉瘤组，分别比较其发病及变化特点。结果 共纳入KD患儿356例，冠状动脉损害发生率为41.3％（147/356）；巨大型和中小型冠状动脉瘤组确诊前发热时间明显长于冠状动脉扩张组［(18.5±12.0) d、(12.9±8.2) d vs (7.4±3.6) d， P均<0.01］］。有119例（81.0％，119/147）冠状动脉损害患儿定期门诊随访。随访2年，超声心动图显示冠状动脉扩张组72例患儿冠状动脉全部恢复正常；中小型冠状动脉瘤组77.8%（28/36）患儿冠状动脉恢复正常；巨大型冠状动脉瘤组11例患儿无一例恢复正常。40例冠状动脉有损害的KD患儿恢复期三磷腺苷负荷超声心动图检查结果显示中小型和巨大型冠状动脉瘤组室壁运动异常、冠状动脉血流储备下降的发生率显著高于冠状动脉扩张组（P< 0.05）。结论 KD患儿急性期冠状动脉扩张损害为一过性；大部分中小型冠状动脉瘤改变可恢复；巨大型冠状动脉瘤造成的损害可长期存在。超声心动图和三磷腺苷负荷超声心动图对追踪观察KD冠状动脉损害的变化及心肌供血有重要帮助。     

Long-term prognosis of giant coronary aneurysm in Kawasaki disease: an angiographic study

The incidence of coronary obstruction subsequent to giant coronary aneurysm in Kawasaki disease was studied. In 20 cases, aneurysms with a maximal diameter greater than 8 mm were identified by coronary angiography 2 to 120 months (mean 16.9 months) after onset. There were 25 giant aneurysms among these 20 patients, all of whom underwent coronary angiography between 12 and 134 months (mean 31.7 months) after initial examination. Coronary obstruction occurred in six cases (30.0%), all within 4 years of onset of disease. There were five obstructive aneurysms in the right coronary artery (5/12; 41.7%) and two in the left coronary artery (2/13; 15.4%). One of these patients developed symptomatic myocardial infarction. Two had abnormal electrocardiographic findings suggesting myocardial infarction. In five cases, persistent perfusion defects were found by myocardial imaging. On the other hand, in two patients giant aneurysms persisted without obstructive changes for greater than 10 years. In both cases the aneurysm was in the left coronary artery and obstruction of the right coronary artery was found at initial angiography. These results seem to indicate the limited efficacy of antiplatelet therapy for giant coronary aneurysms in Kawasaki disease and that giant aneurysms are likely to progress to become obstructive within a few years even if antiplatelet therapy is given. Other forms of treatment, including surgery, should therefore be considered in such patients.     

超声心动图和64层螺旋CT冠状动脉成像在川崎病冠状动脉瘤随访中的应用价值

目的探讨超声心动图和64层螺旋CT冠状动脉成像（64SCTCA）在川崎病（KD）冠状动脉瘤临床诊断和随访中的应用价值。方法选择2006年12 月至2007年5月在首都医科大学附属北京儿童医院门诊随访的KD并发冠状动脉瘤患儿作为研究对象。患儿观察终点随访时依据病变程度除行超声 心动图检查外,同时行64SCTCA检查,对各项检查结果进行详细描述,并分析其应用价值。结果研究期间纳入15例患儿,急性期KD超声心动图检 查显示急性期累及冠状动脉48/60支（80％）。患儿观察终点随访9个月至8.6年,平均（2.8±2.0）年,超声心动图示14/48支(29.2％)冠状动 脉瘤或扩张消退,其余进一步扩张或无明显变化,累及冠状动脉34/60支（56.7%）,同时检测出2处血栓,未发现狭窄及钙化。64SCTCA示累及 冠状动脉30/60支（50％）,主要累及右冠状动脉和左前降支,分布部位与超声心动图检查基本一致,64SCTCA与超声心动图检查对冠状动脉瘤 最大内径的测量值具有较好的相关性（r =0.837,P<0.001）,64SCTCA发现4处血栓、5处钙化及3处狭窄。结论64SCTCA和超声心动图在KD并发 冠状动脉瘤患儿的随访中具有各自的应用价值,两种方法的联合应用可增加冠状动脉病变的检出率。     

冠状动脉造影和三磷酸腺苷负荷超声心动图对川崎病冠状动脉损害远期追踪的价值

目的 探讨选择性冠状动脉造影及三磷酸腺苷负荷超声心动图对川崎病（KD）冠状动脉损害远期追踪的价值。方法 选取1999至2007年广州市儿童医院KD急性期超声心动图检查发现合并冠状动脉损害的患儿，同时采用三磷酸腺苷负荷超声心动图及选择性冠状动脉造影于恢复期进行远期随访。结果依据纳入标准和排除标准逐层筛选，确定9例KD患儿为本研究的样本。男8例，女1例，急性期发病年龄为1～10岁，平均（4.44±3.09）岁。检查时年龄4～12岁，平均（7.89±2.62）岁。追踪时间1.5~7年，平均（3.44±1.67）年。急性期超声心动图示9例患儿中冠状动脉巨瘤5例，冠状动脉瘤3例，冠状动脉扩张1例。三磷酸腺苷负荷超声心动图示：节段性室壁运动异常6/9例；冠状动脉血流储备下降5/9例。冠状动脉造影示：双侧主干冠状动脉瘤4例，同时伴远端动脉瘤3处，冠状动脉左前降支狭窄1处，并冠状动脉扭曲，狭窄或充盈缺损3处，附近侧支血管形成1处；左前降支动脉瘤、右冠状动脉闭塞伴侧支循环形成1例，冠状动脉扩张4例。与同期超声心动图检查比较 ，冠状动脉造影新发现冠状动脉远端瘤3处，右冠状动脉远端狭窄2处，左前降支狭窄1处，右冠状动脉闭塞伴侧支血管形成1例。5例三磷酸腺苷负荷超声心动图检查结果阳性者与冠状动脉造影比较：均发现相应冠状动脉支狭窄或充盈缺损表现；1例三磷酸腺苷负荷超声心动图检查结果阳性，冠状动脉造影仅见轻度冠状动脉扩张。结论 KD合并冠状动脉损害特别是动脉瘤造成的心脏损害可长期存在。对于远期追踪观察KD患儿冠状动脉病变，三磷酸腺苷负荷超声心动图具无创、安全可靠的优点，是判断心肌缺血的重要方法；选择性冠状动脉造影可明确显示冠状动脉病变的位置、形态、数目及严重程度，特别对冠状动脉狭窄、闭塞及远端病变能做出准确的评估。两种方法结合检查对KD冠状动脉损害的远期追踪有重要帮助。     

川崎病合并冠状动脉瘤63例临床分析

目的分析川崎病(KD)合并冠状动脉(以下简称冠脉)瘤患儿的临床特点。方法对首都医科大学附属北京儿童医院2000—2007年收治的63例超声心动图诊断为冠脉瘤的KD患儿临床资料、实验室检查、超声及心电图检查结果、治疗情况及随诊资料进行回顾性分析。结果(1)冠脉瘤患儿男性明显多于女性,男∶女为5.3∶1;冠脉巨大瘤男女比例为8.3∶1;<1岁患儿多发,占28.6%。(2)本组患儿中不完全KD、静脉注射丙种球蛋白(IVIG)抵抗以及KD复发的发生率均较高,分别为36.5%、30.2%和7.9%;急性期57例(90.5%)患儿使用IVIG冲击治疗,3例未用,3例使用情况不详;36例(57.1%)患儿发病至丙种球蛋白应用的时间间隔大于10 d。(3)超声检查发现小冠脉瘤患儿7例,中等冠脉瘤19例,巨大瘤37例,左冠脉受累者占76.2%,其中58.3%发生在前降支;右冠脉受累者达87.3%,其中47.3%发生在右冠Ⅱ段;双侧冠脉同时受累者占63.5%。(4)随诊发现71.4%冠脉瘤呈现回缩趋势,45.2%的受累分支冠脉瘤消退,平均消退时间为(2.1±1.5)年。结论对于男性、发病年龄<1岁、不完全KD、发生IVIG抵抗、复发患儿及应用IVIG治疗较晚患儿要警惕冠脉瘤的发生;左冠前降支及右冠脉瘤样病变最多见,多数冠脉瘤在恢复期发生回缩。     

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??ObjectiveTo investigate the clinical characteristics and prognosis of coronary aneurysm in children with Kawasaki disease.MethodsCoronary aneurysm was identified by using echocardiography in 63 children with Kawasaki disease from 2000 to 2007.Their gender,age,clinical presentations,use of intravenous gamma immunoglobulin (IVIG),laboratory study results and echocardiographic study results in the acute and convalescent phase were examined retrospectively.Results(1) Boys and infants were more likely to develop coronary aneurysms,the male to female ratio being 5.3??1,and for patients with giant aneurysms the male to female ratio was 8.3??1.(2)The rate of incomplete KD,IVIG non-responders and recurrence in this group of patients were 36.5%,30.2% and 7.9%,respectively,which were higher than the whole KD group.In the acute phase,57 of 63 patients were treated by IVIG with different doses,3 of them did not receive IVIG treatment and the other 3 patients?? IVIG treatments were unknown.The duration from onset to IVIG treatment was longer than 10 days in 36 of the 63 (57.1%) children.(3) Small aneurysms were detected by 2-D echo in 7 patients,medium aneurysms in 19 patients and giant aneurysm in 37 patients.In all of these patients,76.2% of them had left coronary artery aneurysms,and 87.3% of them had right coronary artery aneurysms;47.3% of them had both left and right aneurysms.In the patients with left coronary aneurysms,58.3% of them have left anterior descending branch aneurysms; and in patients with right coronary aneurysms,47.3% of them were located in the right coronary artery segment II.(4) Coronary aneurysm regressed in 71.4 % of the branches.The lumen diameter of the affected branches returned to normal in 45.2% of them,with a mean regression time of 2.1??1.5 years.ConclusionBeing male,younger than 1 year old,incomplete KD,IVIG non-responder,recurrence and later IVIG treatment are possible risk factors of coronary aneurysms in children with Kawasaki disease.Most children have multi-coronary artery aneurysms and left anterior descending branch and right coronary artery are the most commonly affected branches??and most of the coronary aneurysms have the tendency to regress during the convalescent phase.     

Case-control study of giant coronary aneurysms due to Kawasaki disease

BACKGROUND: Epidemiologic features of the formation of giant coronary aneurysm due to Kawasaki disease and its risk factors are not still clear. METHODS: One hundred and five patients with giant coronary aneurysms were selected from the 15th and 16th nationwide surveys of Kawasaki disease in Japan. With all other patients reported from the same hospital as a control group, odds ratios (OR) were calculated for some potential risk factors. RESULTS: Some factors affecting the formation of giant coronary aneurysms were revealed. Of these factors, the following were considered to be useful for the treatment of patients with Kawasaki disease: male sex (OR compared with females = 1.99), 0 years old (OR compared with 1-2 years = 1.71), visiting the hospital on 1-3 days of illness (OR compared to 4-6 days = 1.72), leukocyte count (OR with 1000 /mm3 increase = 0.56), neutrophil concentration among leukocyte (OR with 10% increase = 1.11), hemoglobin concentration (OR with 1 mg/dL increase = 0.73), alanine aminotransferase level (ALT; OR with 10 IU/dL increase = 1.02) and serum sodium level (OR with 1 mEq/L increase = 0.80). CONCLUSIONS: The observation of 105 cases with giant coronary aneurysms due to Kawasaki disease reported in the nationwide survey provides information about some risk factors and other considerations about the aneurysms.     

Intracoronary Urokinase in Kawasaki Disease: Treatment and Prevention of Myocardial Infarction

The main cause of death in Kawasaki disease is myocardial infarction due to thrombotic occlusion of a coronary aneurysm. Intracoronary thrombolytic treatment was performed in 15 patients with Kawasaki disease with giant coronary aneurysms. Three patients had acute myocardial infarction, four demonstrated silent myocardial infarction, three suffered chest pain and five did not show ischemia features but had massive thrombus in the coronary aneurysms. Urokinase was infused into the coronary aneurysms as a bolus of 8,000 to 10,000 units/kg via a catheter over 10 minutes. Partial but significant coronary recanalization was achieved after injection of urokinase in a patient with acute myocardial infarction. Complete resolution of massive intracoronary thrombi was observed in 3 of 15 patients, and partial resolution was recognized in 4 cases. In 7 patients, the size of thrombus did not change. Recurrence of the thrombus was observed in 4 patients by serial two-dimensional echocardiography. Urokinase was readmmistered and two showed significant reduction in the thrombus. All patients have been followed for more than 2 years with longest 8 years (mean: 3.3 yrs), and none have had a recurrence of myocardial infarction or died. These findings suggest that intracoronary urokinase is useful for the treatment and prevention of myocardial infarction in Kawasaki disease.     

Arm ischemia revealing Kawasaki disease]

An aneurysm of the medium arteries is one of the major complications of Kawasaki syndrome. Eleven cases of giant coronary aneurysm have been reported. CASE REPORT: We report a new case in a nine-month-old child. Ischemia of the left hand was the first symptom. Diagnosis was made 30 days later. Anticoagulant and fibrinolytic treatments did not prevent necrosis of four fingers. CONCLUSION: The prognosis of Kawasaki disease depends on early diagnosis and management. Infants younger than seven months of age are more susceptible to developing coronary and midartery aneurysms, which therefore justifies a close observation during the acute phase and later on. In the case of a coronary artery aneurysm, Doppler echography of the upper and lower limbs is mandatorily recommended. Anticoagulant therapy should be started once the diagnosis of mid-artery aneurysms is made. Ischemia of the extremities can lead to necrosis and amputation. Until now, anticoagulants, vasodilators and fibrinolytic agents were not proven to be effective.     

Ticlopidine plus aspirin for coronary thrombosis in Kawasaki disease

Selective inhibitors of the adenosine 5'-diphosphate pathway of platelet activation have been used rarely in children in the United States. We report the successful use of ticlopidine, together with aspirin, in a 7-month-old infant with Kawasaki disease complicated by a thrombus in a giant coronary aneurysm that failed to resolve with thrombolytic therapy. Kawasaki disease, coronary aneurysms, antithrombotic therapy, ticlopidine, children.     

Prevalence of coronary artery lesions on the initial echocardiogram in Kawasaki syndrome

OBJECTIVES: To determine whether coronary artery lesions (ectasia and aneurysm) are commonly observed on the initial echocardiogram of patients with acute Kawasaki syndrome, whether coronary artery ectasia and/or aneurysms occur more frequently in patients with incomplete Kawasaki syndrome than in those patients with complete findings, and whether earlier diagnosis and treatment of Kawasaki syndrome are associated with less frequent occurrence of coronary artery ectasia and/or aneurysm. DESIGN: A retrospective medical record review. SETTING: A tertiary care pediatric hospital. PARTICIPANTS: One hundred patients treated for Kawasaki syndrome between July 1, 1998, and June 30, 2003, who were identified by a medical record search. MAIN OUTCOME MEASURE: Prevalence of coronary artery lesions (ectasia and aneurysm) on the initial and subsequent echocardiograms. RESULTS: Forty-four percent of patients had a coronary artery lesion (31% with ectasia, 13% with aneurysm) on the initial echocardiogram. Patients with incomplete Kawasaki syndrome were treated significantly later (median, 10 days) and had a significantly higher occurrence of coronary artery aneurysms over the course of their illness (37%) than those with complete Kawasaki syndrome, who were treated at a median of 7 days (P<.001) and had a 12% aneurysm occurrence (P = .009). Patients treated by day 7 of illness had a less frequent occurrence of aneurysm (6%) compared with those patients treated between days 8 and 10 of illness (27%) (P = .03). CONCLUSIONS: Coronary artery lesions are frequently detected on the initial echocardiogram of children with Kawasaki syndrome. If future studies show ectasia to have a relatively high degree of specificity for Kawasaki syndrome, the initial echocardiography may be a useful adjunctive diagnostic test.     

Giant coronary aneurysms due to Kawasaki disease: A case−control study

BACKGROUND: Epidemiologic features of giant coronary aneurysm due to Kawasaki disease and its risk factors are still not clear. METHODS: Sixty-six patients with giant coronary aneurysms were reported to a 15th nationwide survey of Kawasaki disease in Japan. With all other patients treated in the same hospital as a control group, odds ratios were calculated for certain potential risk factors. RESULTS: Infant males aged less than 1 year,neutrophil concentration among leukocyte, late administration of intravenous gammaglobulin (IVGG) therapy and additional administration of IVGGwere considered as risk factors of giant coronary aneurysms due to Kawasaki disease. In univariate analysis, use of IVGG therapy and a large amount of IVGG (2500+ mg/kg)elevated the risk, whereas the relationship disappeared after the adjustment. CONCLUSIONS: The observation of 66 cases with giant coronary aneurysms due to Kawasaki disease reported to the nationwide survey provides some risk factors and consideration about the aneurysms.     

Kawasaki disease with severe cardiac sequelae: lessons from recent New Zealand experience

OBJECTIVES: To review recent cases of Kawasaki disease (KD) with significant cardiac sequelae in New Zealand. It is known that intravenous immunoglobulin (IVIG) reduces the risk of coronary artery aneurysm formation if given within 8-10 days of onset of KD. METHODS: Retrospective review of medical course, criteria for KD, laboratory and cardiac findings for six children identified with KD and significant coronary artery sequelae. RESULTS: There was delay in diagnosis of KD in three of the six children. Three cases were atypical by extremes of age (2 months, 10 years, 14 years). By definition all six children had significant coronary artery involvement. One patient had a thrombus detected in a coronary aneurysm 3 weeks after KD. One patient underwent coronary artery bypass grafting for unstable angina 2 years after KD. One patient developed coronary artery aneurysms after an initial 'toxic shock' type illness evolving to KD. Three patients died, one due to rupture of a coronary artery aneurysm, two from rapid early coronary artery obstruction occurring at three and 4 months after initial KD. CONCLUSIONS: Kawasaki disease remains an important cause of mortality and morbidity for children. Diagnostic delay beyond 8 days reduces the chances of successful IVIG therapy in KD. Current studies supported by the Paediatric Surveillance Unit should establish the epidemiology of KD in New Zealand.     

Six principal symptoms and coronary artery sequelae in Kawasaki disease

Background:  The relationship between coronary artery sequelae due to Kawasaki disease and the six principal symptoms associated with the latter are still unknown.
Methods:  Among the 16 952 patients reported in the 17th nationwide survey on Kawasaki disease, 14 068 were found to have definite and typical cases with five or six principal symptoms. The proportions of coronary artery aneurysms including dilatation of the artery were compared between the patient group with six symptoms and that with five.
Results:  Percentages for those with all six symptoms (7223) were 4.7% for coronary dilatations (i.e. small aneurysms), 1.7% for coronary aneurysms (i.e. middle-sized aneurysms), and 0.42% for giant coronary aneurysms (i.e. large aneurysms) 1 month after onset, whereas for those with five symptoms (6845), the corresponding percentages were 4.1%, 1.4%, and 0.22%, respectively. For overall observation, the odds ratios were 1.44, 1.28, and 1.70 for the three types of aneurysm, respectively. For male patients, all the odds ratios were >1.0, and some were significant. In contrast, odds ratios <1.0 were observed among those with six symptoms in some subgroups among female patients despite the lack of significance.
Conclusions:  Because odds ratios were elevated – especially for male patients with Kawasaki disease – with all six principal symptoms, patients with the six symptoms are more problematic for coronary sequelae among the definite cases, although there was not a specific symptom for the sequelae.     

Successful pregnancy after coronary artery bypass grafting for Kawasaki disease

Abstract A 13-year-old girl with a history of Kawasaki disease underwent coronary artery bypass grafting because of angina pectoris due to a giant coronary artery aneurysm on the left main trunk artery. Nine years after the operation, the patient had an uneventful pregnancy followed by a normal vaginal delivery. This is the first case of a successful pregnancy after coronary artery bypass grafting for Kawasaki coronary artery disease.     

川崎病合并冠状动脉瘤患儿应用华法林治疗的安全性

目的探讨川崎病合并冠状动脉瘤患儿应用华法林治疗的安全性和转归。方法选择2011至2020年湖南省人民医院收治的川崎病合并巨大冠状动脉瘤、1支冠状动脉血管内发生多个冠状动脉瘤或冠状动脉内发生血栓的患儿共21例进行前瞻性研究,应用华法林治疗,将国际标准化比值(INR)目标范围控制在2.0~3.0。在治疗开始时,治疗后1、2、3、4周及2、3、6、12个月,观察治疗前后冠状动脉瘤直径、数量、部位和冠状动脉内血栓的变化,并监测INR、心电图、肌酸激酶同工酶(CK-MB)、肌钙蛋白I。实施规范的华法林出血风险培训与管理,并根据家长实际落实情况,分为落实组和未落实组,比较2组患儿出血的发生情况。组间比较采用秩和检验或Fisher确切概率法。结果21例患儿男15例、女6例,发病年龄为2月龄至6岁。入组时评估冠状动脉病变为Ⅱ级有4例、Ⅲ级有7例、Ⅳ级有7例、Ⅴ级有3例。10例发生血栓的患儿临床发现血栓的时间为病程第4天至4个月。应用华法林治疗后,其剂量分布在0.06~0.10 mg/(kg·d),INR为1.80~2.59,10例有血栓的患儿有8例消失,2例未消失的Ⅴ级患儿的血栓有不同程度机化。治疗后,4例Ⅱ级病变患儿的冠状动脉均恢复正常;7例Ⅲ级病变患儿中有3例冠状动脉瘤消失,4例无改变;7例Ⅳ级病变患儿中5例冠状动脉瘤缩小为Ⅲ级,2例无改变;3例Ⅴ级病变患儿瘤体无改变。治疗后均没有新发血栓及新冠状动脉瘤出现。21例患儿治疗前后心电图无特殊改变,治疗前后肌钙蛋白I和CK-MB差异均无统计学意义[0.07(0~3.01)比0.04(0~0.29)μg/L,20.6(11.2~58.2)比29.0(16.7~47.0)U/L,Z=0.932、1.906,均P>0.05]。华法林出血风险管理落实组患儿出血发生率明显低于未落实组,差异有统计学意义(2/15比4/6,Fisher值=5.689,P=0.031)。结论应用INR 2.0~3.0为目标范围,结合川崎病并冠状动脉瘤的严重程度来调整华法林剂量,并予以规范而严格的管理与培训,可增加川崎病患儿华法林治疗的安全性,改善患儿的冠状动脉病变,治疗血栓及预防新血栓,降低出血风险。     

Ring-Calcification of Giant Coronary Artery Aneurysm of an 11-Year-Old Child with History of Kawasaki Disease

We present radiographic images of ring-calcification of a giant aneurysm of the left main coronary artery in a child, 7 years after the initial diagnosis of Kawasaki disease, as well as acute medical management and surgical bypass of the obstructed left anterior descending coronary artery.     

Intravascular Ultrasonography of an Adolescent Boy with a Coronary Artery Aneurysm Due to Kawasaki Disease

A 14-year-old boy developed coronary aneurysms during the course of Kawasaki disease. The vessel wall morphology of the coronary arteries was assessed by intravascular ultrasound imaging (IVUS). There was intimal thickening proximal to, within, and distal to a large coronary aneurysm in the left anterior descending coronary artery only 18 months after the acute onset of Kawasaki disease. Intimal thickening without calcification is a new IVUS finding within a persistent coronary aneurysm. It may indicate that the healing process, via cell proliferation is continuing, with the risk of causing a stenosis.