Alparslan Şahin

Assessment of the Relationship Between Waist Circumference as an Anthropometrical Indicator of Central Obesity and Fluoroscopic Exposure Time in Different Gender Patients Who Underwent Radiofrequency Catheter Ablation Due to Antiarrhythmic Drug-Refractory Tachycardia: a Multicenter Study

Introduction: Radiofrequency catheter ablation therapy has been used to treat arrhythmia such as supraventricular and/or ventricular tachycardia. Increased waist circumference is important in assessing central obesity and may be an important factor for radiation injury. Therefore, this article describes the association between waist circumference and fluoroscopic exposure time during cardiac radiofrequency catheter ablation procedures for symptomatic drug-resistant tachycardia. Patients and Methods: From August 2011 to March 2015, 214 (136 women, 78 men) consecutive patients with symptomatic drug-resistant atrioventricular nodal re-entrant tachycardia (174 patients), atrioventricular re-entrant tachycardia (12 patients), Wolf-Parkinson-White syndrome (5 patients), atrial tachycardia (8 patients), atrial flutter (7 patients), right ventricular outflow tract tachycardia (5 patients), and atrial fibrillation (3 patients) underwent an invasive electrophysiological study and radiofrequency catheter ablation. The fluoroscopic exposure time, radiofrequency catheter ablation time, and waist circumference were measured during the electrophysiological study. Results: Although age was significantly higher in women than in men, body weight, body height, waist circumference, and radiofrequency catheter ablation time were significantly higher in men than in women. There was a correlation between waist circumference and fluoroscopic exposure time (p= 0.04, r= 0.13). Conclusion: The study showed that there was a positive correlation between waist circumference and fluoroscopic exposure time in patients with antiarrhythmic drug-refractory tachycardia who underwent radiofrequency catheter ablation. This finding could help prevent radiation injury, especially increased waist circumference during radiofrequency catheter ablation.

Sol Ventrikül Apeksini Besleyen Sol Sirkumfl eks Arter ve Sol Ön İnen Arter-Çift Koruma

Figure 1. Diagnostic cranial left coronary artery angiography revealed that the left ventricular apex was supplied by the left circumfl ex coronary artery and left anterior descending coronary artery. MMV: Mechanical mitral valve, Arrows: Distal portion of left anterior descending coronary artery and left circumfl ex coronary artery

Left Circumflex and Left Anterior Descending Coronary Artery Supplying the Left Ventricular Apex-Double Protection

Figure 1. Diagnostic cranial left coronary artery angiography revealed that the left ventricular apex was supplied by the left circumfl ex coronary artery and left anterior descending coronary artery. MMV: Mechanical mitral valve, Arrows: Distal portion of left anterior descending coronary artery and left circumfl ex coronary artery

Simulation of Eisenmenger syndrome with ventricular septal defect using equivalent electronic system.

BACKGROUNDnIn this study, we aim to investigate the simulation of the cardiovascular system using an electronic circuit model under normal and pathological conditions, especially the Eisenmenger syndrome.nnnMETHODS AND RESULTSnThe Eisenmenger syndrome includes a congenital communication between the systemic and pulmonary circulation, with resultant pulmonary arterial hypertension and right-to-left reversal of flow through the defect. When pulmonary vascular resistance exceeds systemic vascular resistance, it results in hypoxaemia and cyanosis. The Westkessel model including Resistor-Inductance-Capacitance pi-segments was chosen in order to simulate both systemic and pulmonary circulation. The left and right heart are represented by trapezoidal shape stiffness for better simulation results. The Eisenmenger syndrome is simulated using a resistance (septal resistance) connected between the left ventricle and right ventricle points of the model. Matlab® is used for the model implementation. In this model, although there is a remarkable increase in the pulmonary artery pressure and right ventricle pressure, left ventricle pressure, aortic pressure, aortic flow, and pulmonary compliance decrease in the Eisenmenger syndrome. In addition, left-to-right septal flow reversed in these diseases.nnnCONCLUSIONnOur model is effective and available for simulating normal cardiac conditions and cardiovascular diseases, especially the Eisenmenger syndrome.