Total Correction of Tetralogy of Fallot at Early Age: A Study of 183 Cases.

BACKGROUND: Opinions regarding the optimal time for the repair of tetralogy of Fallot vary. A debate also exists about the timing of repair for the asymptomatic infant. METHODS: This study included 183 patients with tetralogy of Fallot. All patients were subjected to clinical examination with measurement of oxygen saturation, 12-lead ECG, plain chest x-ray, and complete laboratory investigation. Echocardiography and cardiac catheterisation were indicated if there was an inability to reach diagnosis by echocardiography, suspicion of coronary anomaly, evaluation of distal pulmonary arteries or suspicion of major aorto-pulmonary collaterals. Complete repair was done in all patients. Patients were divided into two groups for comparison. Group 1 (147 patients, 1-year-old or less), and Group 2 (36 patients older than 1 year). RESULTS: Three patients died in Group1 (2.04%) while there was no early mortality in Group 2 patients. Six patients in Group 1 (4.08%) were reoperated for significant residual or recurrent right ventricular outflow stenosis, three patients (2.04%) were reoperated for residual significant shunt, and three patients (2.04%) were reoperated for residual significant stenosis and residual significant shunt. That is in addition to three patients (2.04%) who had significant tricuspid regurgitation, three more patients (2.04%) who needed a permanent pacemaker implantation, and nine patients (6.1%) who had significant postoperative pulmonary valve regurgitation. On the other hand, for Group 2 patients, there were only three patients who were reoperated for postoperative restenosis and significant shunt, three patients who were reoperated for permanent pacemaker implantation, and another two patients who had insignificant restenosis to be followed up. CONCLUSIONS: Early complete tetralogy of Fallot repair can be accomplished with a low mortality.

Impact of aortic prosthesis-patient mismatch on left ventricular mass regression.

BACKGROUND: Prostheses used for aortic valve replacement may be small in relation to body size, causing prosthesis-patient mismatch and delaying left ventricular mass regression. This study examined the effect of prosthesis-patient mismatch on regression of left ventricular mass after aortic valve replacement. METHODS: We prospectively studied 96 patients undergoing aortic valve replacement between 2007 and 2012. Mean and peak gradients and indexed effective orifice area were measured by transthoracic echocardiography at 3 and 6 months postoperatively. Patient-prosthesis mismatch was defined as indexed effective orifice area ≤0.85 cm(2)·m(-2). RESULTS: Moderate prosthesis-patient mismatch was present in 25% of patients. There were no significant differences in demographic and operative data between patients with and without prosthesis-patient mismatch. Left ventricular dimensions, posterior wall thickness, transvalvular gradients, and left ventricular mass decreased significantly after aortic valve replacement in both groups. The interventricular septal diameter and left ventricular mass index regression, and left ventricular ejection fraction were better in patients without prosthesis-patient mismatch. There was a significant positive correlation between the postoperative indexed effective orifice area of each valve prosthesis and the rate of left ventricular mass regression. CONCLUSIONS: Prosthesis-patient mismatch leads to higher transprosthetic gradients and impaired left ventricular mass regression. A small-sized valve prosthesis does not necessarily result in prosthesis-patient mismatch, and may be perfectly adequate in patient with small body size.

Traumatic intrathoracic tracheobronchial injuries: a study of 78 cases.

BACKGROUND: Tracheobronchial injuries are encountered with increasing frequency because of improvements in pre-hospital care. We reviewed our experience of these injuries to determine how to better recognize them and facilitate their correct management. METHODS: Patients with traumatic non-iatrogenic intrathoracic tracheobronchial injuries managed in 2 tertiary centers in Saudi Arabia between 2000 and 2012, were studied. Clinical presentation, diagnostic evaluation, management, and outcome were reviewed. RESULTS: 78 patients with tracheobronchial injuries were included in this study. They were divided into 2 groups according to the management strategy. Forty-seven patients who were managed conservatively, and 31 underwent surgery. Surgery allowed shorter intensive care unit and hospital stays; otherwise, the results were comparable between the two groups. CONCLUSIONS: Early recognition and expedient appropriate management are essential in these potentially lethal injuries. Operative management can be achieved with acceptable mortality, and conservative treatment should be considered as a valuable alternative to the well-established surgical treatment.

Predictive factors of supraventricular arrhythmias after noncardiac thoracic surgery: a multicenter study.

BACKGROUND: Supraventricular cardiac arrhythmias are the most common rhythm disturbances in patients following thoracic surgery. The purpose of our study was to determine which of the clinical parameters are the most valuable in predicting postoperative atrial fibrillation (AF) after lung surgery. METHODS: Retrospective analysis was carried out on 987 patients after noncardiac thoracic surgery to define the prevalence, associated risk factors, and clinical course of postoperative arrhythmias. There were 822 men and 165 women, age 34 to 78 years (mean age: 61 ± 8 years). The patients were divided into two groups depending on the occurrence or absence of supraventricular arrhythmia. Group I consisted of 876 patients who were free from rhythm disturbances. The remaining 111 patients exhibited episodes of supraventricular arrhythmia (29 supraventricular tachycardia; 82 AF). These 111 patients were placed in Group II. Preoperative, operative, and postoperative data were reviewed. Statistical analysis was performed. RESULTS: A statistically significant difference was found between the two groups in age, previous history of heart disease, and lung resection, especially pneumonectomy. CONCLUSION: Age, history of prior heart disease, lung resection, and the extent of pulmonary resection are the main risk factors for postoperative supraventricular arrhythmia in patients undergoing major thoracic operations.