Thoracoscopic epicardial ablation of atrial fibrillation: Safety, efficacy, single center experience.

AIMS: Atrial fibrillation (AF) is associated with reduced quality of life and increased risk of ischaemic cerebrovascular events. The left atrial epicardial ablation procedures have evolved towards a successful and safe rhythm control strategy for patients with symptomatic drug-refractory paroxysmal, persistent or post-ablation AF or with a high risk of catheter ablation failure. The aim was to evaluate the efficacy and safety of thoracoscopic ablation at our instituiton. METHODS: We observed 81 patients undergoing thoracoscopic ablation from January 2015 to December 2019. RESULTS: The mean age was 61.3±8.5 years and the average duration of AF was 3.1±2.6 years. The cohort consisted of 16.5% of paroxysmal AF, 36.7% persistent, and 46.8% of long-standing AF. The procedure was completed in 79 patients; during follow-up, 15 patients (19%) received radiofrequency ablation. Freedom from atrial arrhythmia recurrence was 55.7% after a follow-up (FUP) period of 3.1±1.4 years. At the follow-up visit, sinus rhythm was present in 81% of patients. No relationships between arrhythmia recurrence and BMI, LVEF, left atrial dimension, gender, and AF duration were found. Major complications were noticed in 4 patients (5.0%); 2 had peripheral embolisation, 2 patients were converted to a sternotomy. At the time of the FUP visit, 25.3% of patients were using antiarrhythmic and 74.7% were still using anticoagulants. CONCLUSION: In the majority of patients, sinus rhythm remained despite a considerable atrial tachycardia recurrence rate, with a relatively low percentage of patients on antiarrythmic drugs.

Delayed revascularization following complete transection of left anterior descending artery after a stab wound.

INTRODUCTION: Penetrating heart injury as a consequence of a stab wound is usually considered fatal. Nevertheless, there are rare lucky cases with mild symptoms which deserve clinical suspicion and proper management. PRESENTATION OF CASE: We report a penetrating cardiac trauma with left anterior descending coronary artery transection after a stab wound. Successful revascularization without cardiopulmonary bypass support was performed. DISCUSSION: Coronary artery injuries after penetrating cardiac trauma are mostly fatal. The standard approach has traditionally been coronary artery ligation with serious morbidity. We report a case of complete coronary artery transection with delayed revascularization validating the safety of off-pump approach. We add a short literature review of the management of traumatic coronary artery injury. CONCLUSION: This adds to the world literature on coronary artery trauma with successful off-pump revascularization. Coronary artery transection stab-wound victims can have only mild symptoms. Slightest intimation of heart injury should provoke proper clinical examination and management.

Measurement of the flow in coronary artery bypass grafts.

The aim of our study was to measure the flow in coronary artery bypass grafts and to compare the flow between two groups of patients. In group A the arterial revascularization was performed with both internal thoracic arteries using as a Y graft and in group B conventional revascularization using left internal thoracic artery (ITA) attached to the left anterior descending artery (LAD) and venous grafts to the other branches of the left coronary artery was performed. The flow in all grafts was measured at six time points during the operation. The cumulative flow at the end of the operation in the group A (arterial Y graft) was 51.8 +/- 24.5 ml/min and in group B (conventional technique) it was 96.8 +/- 41.1 ml/min (p < 0.05). The flow in left ITA to LAD was similar in both groups (27.3 +/- 15.9 ml/min and 26.3 +/- 16.1 ml/min in group A and B). The flow in right ITA (25.2 +/- 18.4 ml/min) was significantly lower than in venous grafts (72.5 +/- 45.5 ml/min). The calculated flow reserve was 2.2 in group A and 2.1 in group B. We found that the cumulative flow in arterial Y graft was lower in comparison with conventional revascularization. This is due to the lower flow in the right ITA branch of the Y graft compared to venous grafts. However based on clinical results, we can postulate that the flow in the Y graft is sufficient to meet the demand of the myocardium originally supplied by the left coronary artery.