• Journal of Chest Surgery
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• 제48권3호
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• pp.164-173
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• 2015

Background: Hypertrophied myocardium is especially vulnerable to ischemic injury. This study aimed to compare the early and late clinical outcomes of three different methods of myocardial protection in patients with aortic stenosis. Methods: This retrospective study included 225 consecutive patients (mean age, 65{\pm}10 years; 123 males) with severe aortic stenosis who underwent aortic valve replacement. Patients were excluded if they had coronary artery disease, an ejection fraction <50%, more than mild aortic regurgitation, or endocarditis. The patients were divided into three groups: group A, which was treated with antegrade and retrograde cold blood cardioplegia; group B, which was treated with antegrade crystalloid cardioplegia using histidine-tryptophan-ketoglutarate (HTK) solution; and group C, treated with retrograde cold blood cardioplegia. Results: Group A contained 70 patients (31.1%), group B contained 74 patients (32.9%), and group C contained 81 patients (36%). The three groups showed significant differences with regard to the proportion of patients with a New York Heart Association functional classification ${\geq}III$ (p=0.035), N-terminal pro-brain natriuretic peptide levels (p=0.042), ejection fraction (p=0.035), left ventricular dimensions (p<0.001), left ventricular mass index (p<0.001), and right ventricular systolic pressure (p <0.001). Differences in cardiopulmonary bypass time (p=0.532) and aortic cross-clamp time (p=0.48) among the three groups were not statistically significant. During postoperative recovery, no significant differences were found regarding the use of inotropes (p=0.328), mechanical support (n=0), arrhythmias (atrial fibrillation, p=0.347; non-sustained ventricular tachycardia, p=0.1), and ventilator support time (p=0.162). No operative mortality occurred. Similarly, no significant differences were found in long-term outcomes. Conclusion: Although the three groups showed some significant differences with regard to patient characteristics, both antegrade crystalloid cardioplegia with HTK solution and retrograde cold blood cardioplegia led to early and late clinical results similar to those achieved with combined antegrade and retrograde cold blood cardioplegia.

• Journal of Chest Surgery
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• 제24권5호
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• pp.522-528
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• 1991

A successful repair of aortic dissection of descending thoracic aorta was performed in a 48 year old man. The patient was visited ER because of abruptly onset chest pain. On admission, Chest film showed mediastinal widening and undertaken chest CT, echocardiogram and angiogram There was evidence of dilation on descending aorta with internal separation of intimal calcification. Aneurysmal sac with dissection was noted from just below left subclavian artery to 2cm above of diaphragm. He underwent thoracotomy and the impending ruptured aneurysm of the aorta was replaced with a Woven Dacron graft[20Yo Albumin preclotted] using LA-femoral bypass. Postoperative course was uneventful.

• Journal of Chest Surgery
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• 제22권4호
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• pp.580-588
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• 1989

The potential for enhancing myocardial protection by adding high-energy phosphate to cardioplegic solutions [St. Thomas Hospital solution] was investigated in a rat heart model of cardiopulmonary bypass and ischemic arrest. Creatine phosphate was evaluated as an additive to the St. Thomas Hospital cardioplegic solution. Creatine phosphate 10.0 mmol/L as the optimal concentration which improved recovery of aortic flow and cardiac output after a 30 minute period of normothermic [37oC] ischemic arrest. In comparing mechanical function in both groups the mean postischemic recoveries of aortic flow, cardiac output, stroke volume and stroke work [expressed as a percentage of its preischemic control] were significantly greater in STH-CP group than in CP- free control group. In addition to improving function and decreasing CK release, CP reduced reperfusion arrhythmias significantly decreasing the time between cross-clamp removal and return to regular rhythm from 81.8 * 13.9 [sec] in CP-free group to 35.9 * 6.8 [sec] in CP group [P< 0.05] so, exogenous CP exerts potent protective and antiarrhythmic effects when added to the St. Thomas Hospital cardioplegic solution. However, the mechanism of action remains to be elucidated.

• Journal of Chest Surgery
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• 제26권3호
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• pp.228-233
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• 1993

Patients with anomalous connection of the left coronary artery to the pulmonary artery are at risk for myocardial infarction, and early or sudden death. Between 1986 to 1992, a total of 4 of these patients underwent surgical intervention with various operative techniques at our institution. Age at operation ranged from 2 months to 43 years. Three infant patients had congestive heart failure, 2 of them had mitral regurgitaion, and 1 had ST-T change on elctrocardiogram. Operative techniques included direct coronary artery transfer to the aorta[n=2], intrapulmonary tunnel from the aortopulmonary window[n=1], coronary artery bypass using saphenous vein[n=1]. One deaths occured at 2 weeks after direct coronary arterial transfer due to respiratory failure caused by Respiratory Syncitial virus pneumonia. Supravalvar pulmoanry stenosis occured after intrapulmoanry tunnel. We recommend direct aortic implatation of the anomalous coronary artery at the time of diagnosis. Intrapulmonary tunnel from aortopulmonary window or subclavian-coronary anastomosis could be alternatives in whom aortic implantation is not feasible anatomically.

• Journal of Chest Surgery
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• 제24권3호
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• pp.287-291
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• 1991

Intra-aortic balloon pump [IABP] was applied to 12 patients between July, 1987, and September, 1990. The 12 patients included 8 who were assisted with IABP intraoperatively; 4 patients used IABP postoperatively. 8 patients could not be withdrawn from cardiopulmonary bypass [CPB], but 6 of them [75%] were able to separate from CPB with IABP. They all were withdrawn from the balloon. Four [50%] of them are hospital survivors, and alive at the time of this report. 4 additional patients were assisted with IABP, postoperatively. 2 of them [50Yo] were withdrawn from the balloon but died. The overall survival and balloon weaning rates are 33.3% [4/12] % 66.7% [8/12], respectively. IABP was most effective when applied early to patients who had transient and reversible injury to the myocardium.

• Journal of Chest Surgery
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• 제19권4호
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• pp.543-548
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• 1986

Massive air embolism during cardiopulmonary bypass is uncommon but serious and often lethal complication. Following this catastrophic event, the immediate institution of retrograde arterial blood perfusion via superior vena cava was made to remove air emboli from cerebral circulation. This method was performed by removing the arterial perfusion line from aortic cannula and connecting it to superior vena caval cannula. Then, retrograde perfusion at a flow rate of 2Umin via superior vena cava was carried out for 3 minutes. After air returning from the aortic cannula was identified, each line was connected to the cannulae primarily. In 2 cases who had massive air emboli due to air pumping into arterial line, the postoperative complete recovery resulted from this technique, which was used in conjunction with other therapy postoperatively.

• Journal of Chest Surgery
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• 제34권4호
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• pp.365-367
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• 2001

매우 드물게 발생하지만 대동맥판막수술중에 우관상동맥의 급성폐색은 우심실부전을 일으켜 매우 치명적인 결과를 초래할 수 있다. 심한 대동맥 판막부전증을 가진 67세 여자 환자에서 19 mm Hancock II 조직판막을 이용하여 대동맥판막치환술을 시행한 후 심폐기에서 이탈하는 과정주에 우심실부전이 발견되었으며, 우관상 동맥의 폐색을 의심하여 우측 내흉동맥을 사용하여 관상동맥 우회수술을 시행하였고 이후에 심폐기에서 순조롭게 이탈할 수 있었다. 수술후 9일째 시행한 관상동맥 조영술에서 우관상동맥 근위부에 색전에 의한 폐색을 확인할 수 있었다. 이에 저자들은 우관상동맥의 폐색으로 인한 우심부전증이 우관상동맥우회수술후에 회복된 증례를 보고하고자 한다.

• Journal of Chest Surgery
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• 제38권3호
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• pp.241-244
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• 2005

57세 남자가 3년 전부터 발생한 좌측 팔의 통증과 감각이상을 주소로 내원하였다. 환자는 경미한 연하곤란을 호소하는 것 이외에 다른 증상은 얼었다. 좌측 팔의 동맥압은 촉지되지 않았으며, 흉부방사선 사진상 우측 대동맥궁이 의심되었다. 대동맥 조영술 상에서 우측 대동맥궁과 Kommerell 게실이 관찰되었고 좌쇄골하 동맥은 기시부의 완전 폐색을 보였으며 혈류는 척추 혈관을 통해 우회하여 쇄골하동맥에 공급되고 있었다. 전신마취 하에 우측 쇄골하 동맥으로부터 8 m 인조혈관을 이용하여 좌쇄골하 동맥에 연결하였다. Kommerell 게실은 크기가 작아 추적 관찰하기로 하였다.

• Journal of Chest Surgery
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• 제37권1호
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• pp.108-111
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• 2004

흉골에 인접한 재발성 대동맥류의 재수술 시, 흉골재절개 중 발생할 수 있는 동맥류의 뜻하지 않은 천공으로 인한 대량출혈의 위험성이 당면한 문제로 남아있다. 대퇴 동, 정맥 삽관을 통한 체외순환으로 초 저체온하 완전순환정지 방법은 안전한 흉골 재절개를 가능하게 한다. 그러나 체온을 떨어뜨리는 동안에 생기는 심실세동을 동반하는 심근수축력 감소는 좌심실의 팽창을 일으키기 쉽다. 따라서 중심체온 저하 시 좌심실의 팽창을 방지하기 위하여 충분한 정맥혈의 배수가 필수적이다. 저자들은 흉골재절개를 시행하기 전에 원심펌프를 이용한 적극적인 정맥혈의 배수를 통해 좌심실의 팽창없이 초 저체온하 완전순환정지에 도달한 방법을 보고하고자 한다.

• Journal of Chest Surgery
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• 제43권6호
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• pp.753-757
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• 2010

식도 파열 후 발생한 식도 흉막루 및 대동맥 흉막루를 식도와 대동맥 이중 우회술로 치험하여 보고하고자 한다. 48세 남자가 폭발 사고로 인한 손상으로 하부 식도 파열을 진단받았다. 외부 병원에서 1차례 식도 봉합술을 시행받았으나 식도 누출이 지속되었고, 이로 인해 좌측 흉강의 농흉이 동반되어 있었고, 이차적인 대동맥 손상으로 흉부 하행 대동맥에 스텐트를 삽입한 상태로 본원으로 전원되었다. 반복적인 수술 및 농흉으로 인한 유착 및 대동맥 손상을 고려하여 흉골 하행 경로를 통해 식도-위 우회술을 시행하였다. 남아있는 농흉은 감염 징후 없이 만성화 단계를 거치던 중 흉관 삽입 부위로 출혈이 관찰되었다. 검사 결과 흉부 하행 대동맥의 감염성 동맥류로 대동맥 벽이 약해진 상태가 확인되어 대동맥 우회술을 시행하였다. 우측 흉강을 통해 상행 대동맥과 복부 대동맥에 인조혈관으로 우회술을 시행하였고, 흉부 대동액 부위는 결찰하였다. 이후 원위부 결찰 부위에 남아 있는 개통 부위에 대해 혈관 플러그(vascular plug)를 이용하여 색전술을 시행하였다. 환자는 더 이상 출혈 없이 4개월째 외래 관찰 중이다.