Simple atrioventricular (AV) dissociation or AV dissociation caused by third degree AV block?

The article's abstract is not available.

P968 Subcostal M-mode echocardiography of tricuspid annular motion helps recogntion of heart arrhythmias

Recognition of supraventricular arrhythmias and differention between supraventricular and ventricular rhythm abnormalities in ECG can sometimes be difficult due to indiscernible P wave. 1D echocardiography of tricuspid annular motion can quickly and reliably detect atrial contraction (Picture 1, figure 1a.) which has a characteristic appearance for majority of supraventricular arrhythmias. Since subcostal approach is almost always reliable, it allows simple and rapid recognition and differentiation between supraventricular arrhythmias, e.g. atrial fibrillation (Picture 1, figure 1b.) from atrial flutter and nodal rhythm. Detection of atrial contractions enables recognition of AV dissociation in ECG, which helps in differentiation between supraventricular and ventricular arrhythmias. This technique is also useful in checking the function and mechanical efficiency of atrial pacing. Figure 1a. Atrial contraction / sinus rhythm RA = right atrium A = atrial contraction Figure 1b. Atrial fibrillation RA = right atrium a = fibrillary contractions Abstract P968 Figure. Picture 1

A Case of Congenitally Corrected Transposition of Great Arteries: An Infrequent Happenstance

Congenitally corrected transposition of the great arteries (CCTGA) is rare form of congenital heart diseases. It may be present with or without associated anomalies. Patients with CCTGA are usually diagnosed at early stages of life due to associated anomalies, but they may even remain asymptomatic till later decades of their life. We report a case of a 42-year-old man who presented at neurosurgery department with dizziness, seizures, and loss of consciousness, in whom isolated CCTGA was discovered incidentally. Further investigation depicted right ventricular hypertrophy, mild valvular regurgitation, mildly dilated pulmonary artery, low heart rate with AV dissociation, and third-degree heart block. These indicated for implantation of permanent pacemaker into the patient. The implantation of VVI mode pacemaker was uneventful and the patient is being followed up in the past eight months in favorable condition.

Atrioventricular Dissociation after Electroconvulsive Therapy

Electroconvulsive therapy (ECT) is increasingly used as a treatment for psychiatric disorders. Cardiac effects are the principal cause of medical complications in these patients. We report a case of atrioventricular (AV) dissociation that occurred after ECT that was treated with pacemaker implantation. The mechanisms contributing to the onset of AV dissociation in this patient, and the management and rationale for device therapy, in light of the most recent guidelines, are reviewed.