Radiofrequency ablation for atrial fibrillation during concomitant cardiac surgery. Mid-term results.

BACKGROUND: Atrial fibrillation is found in an increasing number of patients undergoing open heart surgery. It is associated with higher mortality rates, risk of stroke and left ventricular dysfunction. Surgical ablation for atrial fibrillation has evolved from the complex"cut and sew" Maze procedure to less invasive techniques, utilizing alternative energy sources. We present our experience with left atrial radiofrequency ablation during cardiac surgery, outlining the technical aspects of the procedure and postoperative outcomes, with emphasis on mid-term freedom from atrial fibrillation. METHODS: The study included 93 consecutive patients with history of atrial fibrillation scheduled for cardiac surgery between January 2008 and December 2011. Concomitant left atrial radiofrequency ablation was performed using monopolar (endocardial) or bipolar (epicardial) systems, depending on the type of underlying cardiac pathology. Duration of the atrial fibrillation, re-do surgery, low ejection fraction, advanced age, or giant left atria were not considered as contraindications. RESULTS: Of the included patients, 73.1 % were discharged in stable sinus rhythm. Overall freedom from atrial fibrillation was 69.6 % at late follow-up, which ranged from 12 to 48 months (median, 22 months) and did not differ for the two approaches (epicardial vs. endocardial). The presence of early atrial tachyarrhythmia was a predictor of atrial fibrillation recurrence (p = 0.026). Age was also associated with higher recurrence rates during hospital stay (p = 0.04), but not for late atrial fibrillation. CONCLUSION: Concomitant left atrial radiofrequency ablation conveyed satisfactory early and mid-term rhythm control, with acceptable postoperative outcomes, given the risk profile of our patient cohort.

Giant metastatic cardiac and abdominal liposarcomas causing hemodynamic deterioration.

Myxoid liposarcoma usually develops in the retroperitoneum or deep soft tissues of extremities. Synchronous cardiac and abdominal metastases are extremely rare. We describe the case of a 63-year-old man, with a history of a thigh liposarcoma, treated by resection, chemotherapy and postoperative radiotherapy 13 years ago. Patient now presented with an intracardial, a pericardial and an abdominal mass, identified as metastatic myxoid liposarcomas. He eventually underwent successful emergency sternotomy and subsequent laparotomy for tumor resection.

Surgical management of lung cancer invading the aorta or the superior vena cava.

OBJECTIVE: Invasion of mediastinal structures (T4) is considered as an absolute contraindication to surgical management of non-small cell lung cancer (NSCLC). The authors studied the role of surgical treatment in case of direct aortic and superior venous caval involvement. PATIENTS: From 1995 to 2000, 13 patients with left lung NSCLC invading descending aorta and 9 patients with right upper lobe NSCLC and superior vena cava (SVC) invasion were subjected to thoracotomy for lung resection. Surgery was indicated in case of absence of intraluminal extension. All patients were cN2 negative. The pathology results and 5-year survival were recorded and analyzed. RESULTS: In three cases (23%) the tumor was adhered to the parietal pleura overlying descending aorta, which was resected en block with tumor-associated lung parenchyma. Aortic adventitia invasion by tumor led to local resection of adventitia (<1cm(2)) in nine patients (69%). Invasion deeper than adventitia was encountered in one case (8%), which was managed with aortic partial occlusion, resection of aortic wall and repair of the defect with Gore graft patch. In three patients (33%) the SVC wall was involved by the tumor 1-3cm in length and 2-4mm of the circumference. The defect was repaired with direct suturing. In five patients (56%) the area of SVC wall that was invaded was 3cmx2cm. The defect was repaired with Dacron patch. In 1 patient (11%) an arterial 14 graft was end-to-end interposed. All resections were radical (R0). Neither associated postoperative complications nor operative mortality was recorded. Five-year survival was 30.7% for the cases with aortic invasion and 11% for the ones with SVC involvement. CONCLUSIONS: Radical surgical resection of lung tumors with localized aortic invasion can be considered after exclusion of N2 involvement.

Diagnostic mini-video assisted thoracic surgery. Effectiveness and accuracy of new generation 2.0 mm instruments.

OBJECTIVE: Recently 2.0 mm mini-VATS has aroused much interest among surgeons involved with endoscopic surgery. We report our initial experience with the first first 54 patients who underwent this procedure. The aim of this study is to evaluate the effectiveness and accuracy of mini-VATS. METHODS: 54 patients were undertaken to mini-VATS for diagnostic purposes. Patients were randomly selected and the indication for operation was set by the classic VATS criteria. 35 (65%) patients were treated under general anesthesia, while 19 (35%) patients were treated under local anesthesia. RESULTS: The average length of hospital stay was 1.8 +/- 0.9 days. The days of requirement for narcotic analgesia were 1.9 +/- 1.0. Diagnostic accuracy was 100%; morbidity and mortality rates were 0%. CONCLUSIONS: The high diagnostic accuracy and low operative danger, combined with less postoperative pain, due to minor surgical trauma and faster patient recovery, has established mini-VATS as a dynamic competitor to the classic VATS procedure. Since high technology is a strong partner in endoscopic surgery, a strong potentiality for evolution exists.

Congenital bronchoesophageal fistula in the adult.

Congenital bronchoesophageal fistulas, when not associated with esophageal atresia, are compatible with life and may persist until adulthood before diagnosis has been established. We report such a rare case of a 55-year-old Caucasian female with a history of repeated pulmonary infections, suffering from cough during the last 12 months due to a mass in the right lung. A bronchoesophageal fistula (type III according to Braimbridge and Keith classification) was incidentally discovered during thoracotomy which was resected and end-sutured. Following that, a right lower lobectomy was performed. The patient had an uneventful recovery. The final diagnosis of congenital bronchoesophageal fistula was established excluding all the reasons that lead to the acquired disease. The diagnostic and therapeutic procedures are analyzed and the relevant literature is reviewed.

Prognostic significance of pleural lavage cytology after resection for non-small cell lung cancer.

OBJECTIVE: In the staging of lung cancer, pleural effusion that is malignant on cytologic examination is regarded as T4 disease, and curative resection cannot be performed. We conducted this study to determine whether cancer cells can be present in the pleural cavity with no pleural effusion, to investigate the factors contributing to that occurrence, and to evaluate its prognostic significance. METHODS: Eighty-five patients (77 males, eight females) with a median age 60.1-+/--7.9 years (31--74 years) underwent a major lung resection, due to lung cancer in our department. From January 1998 to December 1999, 30 pneumonectomies, seven bilobectomies, 46 lobectomies and two wedge-resections were performed. Chest wall resection was performed in four patients. After performing a posterolateral thoracotomy and lung resection with extended mediastinal lymph node dissection, the pleural cavity was filled with 1 l physiologic saline solution (PSS) and the fluid was shaken. The lavage fluid was suctioned off (S1). Immediately after the lavage, the pleural cavity was refilled with 3 l PSS. The surgeon washed out the pleural cavity by hand for 1 min and the fluid was suctioned off. Finally, the pleural cavity was refilled with 1 l PSS and a new lavage fluid was suctioned off (S2). A cytologic examination was carried out for each sample. RESULTS: The pathology report showed 39 adenocarcinomas, 33 squamous-cell, two adenosquamous, four large-cell, two neuroendocrine and five undifferentiated carcinomas. S1 was positive in eight patients (9.4%), while S2 was positive in four patients (4.7%). The correlation of positive pleural lavage and infiltrated lymph nodes demonstrated a statistically significant relation between presence of N2 disease and positive S2 sample (P = 0.049). No significant correlation existed between positive lavage sample (S1 or S2) and TNM stage, level of T, extent of tumor invasion, kind of operation, histological type or differentiation of the cancer (Chi square test). The mean follow-up is 11.3 +/- 6.2 months (4--22 months). There are 78 patients alive. A significance difference in survival was identified in-patients with positive S1 (P = 0.0081), and positive S2 (P = 0.0251) (Kaplan--Meier). CONCLUSION: The cytologic results of lavage were positive for malignant cells in eight of 85 patients (9.4%). The existence of cancer cells in the pleural cavity can be the result of their exfoliation or surgical manipulations. The mechanical irrigation subdivides the percentage of positive samples. Our study supports that the positive findings on pleural lavage cytology is an essential prognostic factor.

Wedge resection of the bronchus: an alternative bronchoplastic technique for preservation of lung tissue.

OBJECTIVES: We present a modified wedge resection of the bronchus, as an alternative bronchoplastic technique for lung resection, in cases of patients with or without adequate pulmonary reserve to undergo a pneumonectomy, in order to preserve lung tissue. METHODS: Seventeen patients underwent a major lung resection with wedge resection of the bronchus for non-small cell lung cancer (NSCLC) in our department, from March 1995 to October 1999. A right-sided NSCLC were diagnosed in 17 males, with a mean age 62.5+/-6.6 (range 51-72) years. Further workup was free of metastatic disease. All patients underwent a right posterolateral thoracotomy, under general anesthesia with a double lumen endotracheal tube. Twelve right upper lobectomies, four right upper and middle lobectomies and one carinal resection were performed. The wedge resection of the bronchus carried out longitudinally, along the bronchial tree, and the bronchial defect was reapproximated transversely, in a single-layer, with interrupted non-absorbable suture. The frozen section of the distal margin of the resected bronchus was negative for malignancy in all patients. Extended mediastinal lymph node dissection followed each lung resection. RESULTS: The pathology report showed 12 squamous-cell carcinomas, three adenocarcinomas, one adenosquamous carcinoma and one neuroendocrine carcinoma. The differentiation of the carcinomas was well in two cases, moderate in ten and poor in five. The pTNM stage was IB in four patients (23.5%), IIA in one (5.9%), IIB in eight (47.1%) and IIIA in four (23.5%). The median disease-free distal margin of the bronchus was 5 mm (range 2-15 mm). The average postoperative hospital stay was 15 days (range 12-28 days). The morbidity and mortality rate was 11.8 and 5.9%, respectively. Postoperative follow-up was every 6 months. The average survival is 20.0+/-15.2 months (range 1-54 months). There are 12 patients alive, and their follow-up is negative for locoregional recurrence or distant metastasis. The survival study showed no significantly statistic relation to the histologic type, cancer differentiation, pTNM stage, and disease-free distal margin of resection larger or less than 0.5 cm (Kaplan-Meier study log rank method). CONCLUSIONS: The wedge resection of the bronchus as a bronchoplastic procedure is an easy, fast and safe technique of reparation of the bronchial tree. It presents not only a low rate of morbidity and mortality, but also a satisfactory survival.

Mitral valve replacement and tricuspid valve repair in a patient with sickle cell disease.

Sickle cell disease is a rare entity for the European cardiac surgeon to encounter. Low oxygen tension, acidosis and hypothermia may induce sickling and pose a great risk in this population during open heart surgery. We report the management of a 57-year-old Greek woman with homozygous sickle cell disease and rheumatoid arthritis, who underwent preoperative partial exchange transfusion and subsequent mitral valve replacement and tricuspid valve repair at normothermia.