ABSTRACT
Some cases of atrial fibrillation and bradycardia show improvement in slow ventricular response after valvular surgery. However, there is still no established view regarding the indications of pacemaker implantation for the bradyarrhythmia with valvular disease. In 24 cases (permanent pacing group: 15, non-pacing group: 9) of those with bradyarrhythmia who were fitted with a myocardial pacing lead at the time of valvular surgery, we examined predictions of pacemaker implantation and the role of valvular surgery for the bradyarrhythmia. The permanent pacing group showed much larger values than the non-pacing group in regard to preoperative NYHA, right and left atrial pressure, and duration of atrial fibrillation. After valvular surgery, many cases that had significantly decreased left atrial pressure after operation improved with regard to bradycardia. We should judge the indication of pacemaker implantation after valvular surgery from the evaluation of preoperative hemodynamics and early postoperative cardiac function. Because atrial fibrillation tends to accompany bradycardia due to chronic atrial load, we must make an effort to promote the rapid recovery of cardiac function by doing valvular surgery as early as possible.
ABSTRACT
A 61-year-old man had undergone reconstruction of the ascending aorta for acute aortic dissection (DeBakey type I), He had aortic valve regurgitation at 10 months, and cardiac failure at 18 months respectively after his previous operation. Cardiac failure can progress relatively fast in cases of postoperative aortic regurgitation due to redissection, so early surgical intervention should be considered. In this case, redissection of the aortic root at the site of non-coronary sinus was noted intraoperatively, and intraoperative findings suggested necrosis of the aortic wall related to the use of GRF glue. The aortic root replacement using a Freestyle valve was performed, which was followed by arch replacement. The Freestyle valve provided good haemodynamic function and low thrombogenicity. The use of this valve in this case which had residual dissection of the descending aorta might be useful because of the excellent haemodynamic function without anticoagulant therapy and long-term durability.
ABSTRACT
A 52-year-old man with annulo-aortic ectasia and DeBakey's type IIIb dissecting aortic aneurysm was successfully treated. Aortography showed moderate to severe aortic regurgitation and enlargement of the ascending aorta, and CT showed a huge type IIIb dissecting aortic aneurysm. We scheduled a two-staged operation because dissection occurred 6 months previously and ECG showed severe LVH and ST-T change. The aortic root replacement using Bentall's procedure was performed, which was followed by arch replacement with an elephant trunk prosthesis on distal aorta. The entry in the distal aortic arch was covered by an elephant trunk prosthesis and postoperative diagnostic images showed thrombo-occlusion of the false lumen in the descending aorta. This operation was safe and might be a useful method for annulo-aortic ectasia with type IIIb dissecting aortic aneurysm.
ABSTRACT
A 21-year-old man with coronary sinus atrial septal defect (ASD) was treated successfully. This case had been diagnosed as an ASD without a lower margin preoperatively but we confirmed this to be a coronary sinus ASD intraoperatively, and this case was classified as partially unroofed coronary sinus without PLSVC. The diagnosis of coronary sinus ASD before operation is sometimes difficult. Therefore we should pay attention to the location of the defect and the dilated coronary sinus in echocardiography, and the course of the cardiac catheter entering into the left atrium, for a correct diagnosis. In this case, the defect was located in the vicinity of the ostium of a large coronary sinus, therefore we could close the defect between the CS and the LA using a heart-shaped patch without any damage to the AV node.
ABSTRACT
In patients with so-called porcelain aorta characterized by calcification of the total aorta, manipulation of the ascending aorta can cause cerebral infarction and other conditions due to aortic dissection or rupture and calcified debris. In the present case with ischemic cardiomyopathy and porcelain aorta, an occlusion balloon catheter was inserted into the ascending aorta to avoid its clamping, followed by Dor operation and CABG under cardiac arrest with normothermic extracorporeal circulation. Techniques such as deep hypothermic circulatory arrest and surgery while the heart is beating are often currently used as auxiliary methods to avoid aortic clamp. However, the present case with insufficient left ventricular function required a left ventriculotomy, and thus the technique presented here is useful for shortening the surgical time and ensuring a reliable outcome of the operation.
ABSTRACT
Intermittent cold blood cardioplegia with retrograde coronary perfusion was demonstrated in 11 CABG cases and the effects of myocardial protections were compared with 11 cases of antegrade perfusion. We evaluated the effects from the assistant perfusion time after aortic declamping, the incidence of occurrence of spontaneous beating, the dose of catecholamin required after CPB, and the changes in myocardial enzyme values. The two groups were similar in age, ejection fractions, and the extent of coronary artery disease. There were no cases of death and no PMI in all 22 cases, and the mean number of grafts and aortic clamping time were similar in the two groups. Concerning the effects of myocardial protections, there were no significant differences in any items in the two groups. We conclude that intermittent cold blood cardioplegia with retrograde coronary perfusion provides the same myocardial protective effects as the antegrade perfusion in CABG cases.
ABSTRACT
A 56-year-old man with uncontrolled diabetis mellitus was admitted with general fatigue and high fever. Abdominal CT and aortography showed a saccular aneurysm in the left common illiac artery. Salmonella choleraesuis infection was diagnosed on the basis of blood culture. We performed a two-staged operation because of the tight inflammatory adhesions and the abcess formation around the aneurysm. First we performed surgical treatment of the aneurysm and extra-anatomical bypass grafting (F-F crossover bypass). Then the <i>in situ</i> graft replacement was performed, 4 weeks later. After the second surgery, antibiotics were administered for 6 more weeks. The patient remains asymptomatic for 6 months after the record operation.
ABSTRACT
A 51-year-old female inserted a needle through the chest wall in a suicide attempt. Chest roentgenogram showed the needle located in the cardiac shadow and chest CT showed the needle penetrating into the ventricular wall. We removed the needle through median sternotomy. The needle had penetrated the right ventricular myocardium 2mm from the LAD. The tip of the needle reached the diaphragm and the surface of the diaphragm had been injured by the needle. The needle was removed without any difficulty and she was discharged 14 days after the operation.
ABSTRACT
Renal damage caused by hemolysis during cardiopulmonary bypass (CPB) was investigated, and the preventive effects of haptoglobin in regard to this condition was also evaluated. Nineteen patients who underwent open heart surgery were divided into two groups: a control group (<i>n</i>=11) and a haptoglobin group (<i>n</i>=8). In the control group, the level of plasma-free hemoglobin increased significantly after CPB (<i>p</i><0.01), and this level was strongly correlated with renal tubular leaking enzymes: NAG (<i>r</i>=0.76) and γ-GTP (<i>r</i>=0.81), in the Intensive Care Unit or on the first day after surgery. On the contrary, in the haptoglobin group, in which 4, 000 units of haptoglobin was added in the priming solution of CPB, no increased level of plasma free hemoglobin was observed. Furthermore, leak age of renal tubular enzymes were statistically less (<i>p</i><0.05). It was concluded that free hemoglobin was a cause of renal damage during CPB and the damage was preventable by the administration of haptoglobin.