RESUMEN
Between January and December 2006, 3 patients with aortic abdominal aneurysm (AAA) receiving home oxygen therapy (HOT) and 20 patients without HOT were studied. The 3 patients with HOT were all men, the mean age was 72 years (range, 69-74), and they had been treated with HOT for 37.3 months (1-102) due to chronic obstructive pulmonary disease (COPD) with a mean %VC of 96.9% and FEV1.0% of 42.8%. Only the FEV1.0% value in the preoperative data was significantly lower than in patients without HOT. In the 3 patients with HOT, extubation was performed immediately after operation, and minitracheotomy tubes (Mini-trach<sup>®</sup>) to control sputum were inserted in the operation room. The minitracheotomy tubes were removed 5 or 6 days after operation. Postoperatively, no one with HOT had any major complications, while in those without HOT one patient had ileus and another had prolonged intubation. There were no significant differences between the 2 groups in operative time, blood loss, blood transfusion, or hospital stay. In conclusion, based on detached preoperative close estimation and careful postoperative supervision, patients receiving HOT can undergo AAA operations as safely as those not receiving HOT.
RESUMEN
Left ventricular (LV) thrombus is an uncommon primary disease, but following acute myocardial infarction (AMI) it is a common complication associated with a risk of systemic embolism. Especially if the thrombus is ball-shaped, there is a higher risk of systemic embolism. We reviewed 4 cases of thrombectomy including 1 with the acute phase of AMI and another with Takotsubo disease. Between January 2000 and August 2005, 4 consecutive patients underwent thrombectomy for ball-like thrombus in the left ventricle (all men, mean age 53.5 years). We performed thrombectomy through left ventriculotomy. In 3 patients ventriculotomy was repaired with direct closure with double PTFE felt reinforcement, and in the other large acute AMI with the infarction exclusion technique (Komeda-David) because the LV wall was remarkably fragile. All thrombi were ball-like and fresh (mean size 15.8mm). Concomitant coronary artery bypass grafting was performed in 3 cases, the Maze procedure in 2, and mitral annuloplasty (MAP) in 1. All patients survived and have been doing well without any major complications. Surgical thrombectomy is safe and can improve prognosis without systemic embolism. In the acute phase of AMI, the infarction exclusion technique is excellent to prevent bleeding and postoperative remodeling of the left ventricular wall.
RESUMEN
A 68-year-old woman with distal arch aortic aneurysm was admitted. Preoperative magnetic resonance angiography revealed occlusion of the right middle cerebral artery. Single photon emission computed tomography showed decreased cerebral blood flow at rest and decreased reactivity to acetazolamide in the right temporal lobe. At first, a superficial temporal artery to middle cerebral artery anastomosis was made by neurosurgeons. Improvement of both the cerebral blood flow and the reactivity to acetazolamide was confirmed by single photon emission computed tomography 18 days after the operation. Twenty-two days after the operation, a total arch replacement was performed. The postoperative course was uneventful without any neurological complication.
RESUMEN
A 62-year-old man, who had been given a diagnosis of chronic idiopathic thrombocytopenic purpura (ITP), was admitted to our hospital for an operation for abdominal aortic aneurysm (AAA). Preoperative coronary angiography revealed severe triple vessel disease, and we chose to treat this first. The platelet count on his first admission was 2.1×10<sup>4</sup>/μl and preoperative immunoglobulin infusion was introduced for 5 days. Off-pump coronary artery bypass grafting (OPCAB) was performed safely with platelet transfusion, and he was discharged on the 14th postoperative day. Thirty-eight days later, graft replacement of AAA was performed with preoperative immunoglobulin infusion and no platelet transfusion, and he was discharged at the 11th postoperative day. Preoperative immunoglobulin infusion therapy and selection of OPCAB were useful to prevent perioperative bleeding complications. This is the first report of staged cardiac and aortic surgery in a patient with ITP.
RESUMEN
A 74-year-old man was admitted to our hospital to undergo an operation for distal aortic arch aneurysm with chronic aortic dissection. The first operation was attempted through left lateral thoracotomy. Since the aorta had a severely calcified false lumen, conventional aortic replacement was considered to entail greater risk and graft replacement was given up. As an another option, endovascular stent grafting via the aortic arch through median sternotomy was selected as a second operation. Deep hypothermic circulatory arrest with selective cerebral perfusion was used during delivery and deployment of the stented graft through the aortotomy site. The distal stented graft was deployed into the true lumen at the ninth thoracic vertebral level. Neither endoleaks nor complications were observed. Postoperative computed tomography showed complete thrombosis of the distal aortic arch aneurysm and the false lumen. The postoperative course was uneventful. Transaortic endovascular stent grafting is an effective and less invasive treatment for aortic arch aneurysms with severely calcified aorta.
RESUMEN
A 45-year-old man underwent total arch replacement for acute type A aortic dissection. Vital signs during the operation remained stable, but sinus tachycardia was recognized about 7h postoperatively, followed by a high level of PaCO<sub>2</sub>, low level of PaO<sub>2</sub> and metabolic acidosis. Then, blood pressure decreased, accompanied rapid elevation of body temperature to 39.7°C. Body temperature was decreased gradually by cooling the whole body, however, coma, anuria and hypoxemia persisted. A diagnosis of malignant hyperthermia was made and Dantrolene was administered. However, the patient died of multiple organ failure 7 days postoperatively. The serum level of CPK increased to 12, 446IU/<i>l</i> and serum myoglobin elevated to a very high level (36, 500ng/ml) 2 days postoperatively. Although, it is very rare for malignant hyperthermia to develop after open-heart surgery, physicians must keep this disease in mind if sudden hyperthermia of unknown origin is demonstrated.
RESUMEN
A 70-year-old-woman was admmitted to receive an operation for aortic arch aneurysm. Total arch replacement was carried out under deep hypothermic circuratory arrest with selective cerebral perfusion. During sternal closure, her blood pressure dropped to 60/30mmHg suddenly, and massive venous bleeding started from the substernal space which turned out to be hemorrhage from the laceration of the pulmonary trunk. Controlling the bleeding by finger compression, rapid introduction of cardiopulmonary bypass was carried out and the laceration was closed by a pericardial patch. The postoperative course was uneventful. In this case, compression of the pulmonary trunk by the aortic arch aneurysm may have caused the fistula formation between them, and decompression of the aneurysm probably induced the rupture of the pulmonary trunk. If the preoperative computed tomogram had showed the compression of the pulmonary artery by the aneurysm, a careful exploration of the main pulmonary artery and a removal of the thrombus should have been performed, even when the preoperative diagnostic evaluation failed to reveal aortopulmonary fistula.
RESUMEN
An 81-year-old woman developed abdominal pain after off-pump CABG (OPCAB) for unstable angina pectoris. X-ray film and CT scan showed paralytic ileus the day after surgery. A presumptive diagnosis of mesenteric ischemia was made and exploratory laparotomy was performed. During surgery, however, there was no sign of mesenteric ischemia. The patient still complained of abdominal pain after the laparotomy, so selective angiography of the mesenteric artery was performed. The angiography showed remarkable vasospasm of the superior mesenteric artery (SMA) and diagnosis of nonocclusive mesenteric ischemia (NOMI) was made and continuous intra-arterial perfusion of papaverine into the SMA was started. Control angiography during papaverine perfusion showed a clear reduction of vasospasm. Thereafter, the patient developed diffuse peritonitis due to intestinal gangrene on postoperative day 12 and was compelled to undergo extensive resection of the intestine and sigmoidectomy. She could not be weaned from the ventilator due to respiratory insufficiency and died of multiple organ failure about 5 months after OPCAB. NOMI can develop even in OPCAB, in which cardiopulmonary bypass is not required. Therefore maintenance of stable hemodynamics intraoperatively, careful management of the postoperative state and early diagnosis and therapy are essential to prevent NOMI.
RESUMEN
A 65-year-old-man was admitted with congestive heart failure and septic shock associated with suspected mitral valve infective endocarditis. An echocardiogram revealed vegetation attached to the chordae, high density lesions in both papillary muscles, and severe mitral regurgitation. An emergency operation was performed. Vegetation was been attached to the chordae. Multiple myocardial abscesses were noted in both papillary muscles and surrounding myocardium. However, there were few noticeable lesions on mitral valve leaflets and annulus. The anterior mitral leaflet was resected together with the chordae and the papillary muscles containing the myocardial abscesses. Mitral valve replacement was performed using a 27mm SJM valve after the other myocardial abscesses were drained. <i>Klebsiella pneumoniae</i> was cultured from the vegetation and the myocardial abscesses. Cases of myocardial abscess associated with infective endocarditis at the site of the papillary muscles and in the areas of the myocardium are very rare. It was assumed that the myocardial abscesses were probably due to the septic state from infective endocarditis, since myocardial abscesses was recognized in multiple sites and at a distance from the valve leaflets and annulus.
RESUMEN
A 72-year-old man consulted a local physician due to an episode of loss of consciousness. When chest CT was performed after amelioration of symptoms, aneurysmal dilation was detected at the distal aortic arch. On CT, a distal aortic arch aneurysm appeared to be a sacciform aneurysm measuring 55mm in maximum diameter. In addition, coronary arteriography demonstrated complete obstruction of left anterior descending branch #6, while left ventriculography demonstrated left ventricular aneurysm due to old myocardial infarction. The left ventricular end-diastolic volume was increased to 285ml, and the end-systolic volume was increased to 224ml. Moreover, the left ventricular ejection fraction was markedly decreased to 21%. The distal aortic arch aneurysm was treated by total aortic arch replacement. Considering the postoperative development of cardiac failure, the left ventricular aneurysm was simultaneously treated by endoventricular patch plasty, the so-called Dor operation. The postoperative course of this patient was satisfactory, because the end-diastolic volume was decreased to 241ml, and the end-systolic volume was also decreased to 147ml. Furthermore, the left ventricular ejection fraction was increased to 39%, demonstrating an improvement in left ventricular function. In Japan, there have not been any reports describing simultaneous surgery for thoracic aortic aneurysm complicated by left ventricular aneurysm. Therefore, the present study reports the course of this patient, including the indications of endoventricular patch plasty.
RESUMEN
Mitral regurgitation caused by papillary muscle rupture has a poor prognosis and should be operated on soon after onset. We recently encountered a patient who was operated on 8 months after the onset of mitral regurgitation caused by rupture of the posterior papillary muscle. The patient was a 72-year-old man who was admitted as an emergency case for acute left heart failure due to severe mitral regurgitation. As medical treatment was effective, he refused to have mitral valve surgery. Six months later, he was admitted to our hospital complaining of nocturnal orthopnea and underwent surgical treatment. Severe mitral regurgitation with postero-medial papillary muscle rupture was revealed by transesophageal echocardiography. Coronary angiography showed 90% stenosis of the proximal left circumflex artery. At 8 months after the onset of mitral regurgitation, the patient underwent successful scheduled mitral valve replacement together with coronary artery bypass grafting. There are few reports of mitral valve surgery being performed successfully for papillary muscle rupture due to coronary artery disease in the chronic stage.
RESUMEN
Persistent sciatic artery is an embryonic blood vessel that continues to feed the lower extremity after fulfilling an important role in lower limb development during early gestation. It is so rare that only 20 cases have been reported in Japan. This paper describes a case of acute occlusion of a persistent sciatic artey. A 78-year-old woman was admitted to hospital because of sudden onset of severe pain in her left leg. Angiography showed bilateral persistant sciatic arteries (complete type) with occlusion of the left artery and a small aneurysm on the right side. Left femoro-popliteal bypass was performed and postoperative angiography showed that the graft was patent.
RESUMEN
We report a 69-year-old woman with transient mitral valve regurgitation and hemolysis following mitral valve replacement with a Carpentier-Edwards pericardial bioprosthesis. She had a history of congestive heart failure caused by mitral valve regurgitation so we performed mitral valve replacement with a Carpentier-Edwards pericardial bioprosthesis (Model 6900). Three days after surgery, a systolic murmur became clearly audible and the serum LDH level reached a maximum of 2, 018IU/<i>l</i> on postoperative day 10. Echocardiography showed regurgitant flow through the center of the bioprosthetic valve. It was thought that stent distortion of the implanted pericardial bioprosthesis had occurred and re-operation would be necessary, but the regurgitant flow disappeared suddenly on postoperative day 12. If mitral valve regurgitation occurs following mitral valve replacement with a pericardial bioprosthesis, stent distortion should be taken into consideration.