Aortic valve insufficiency due to myxomatous degeneration: a case report and literature review.

Myxomatous degeneration is a non-inflammatory degenerative process leading to disruption of the fibrosa layer of the valve with acid mucopolysaccharide accumulation. This type of degeneration commonly affects the mitral valve leading to mitral regurgitation; however, few cases have been reported regarding myxomatous degeneration of the aortic valve leading to acute decompensated heart failure. We report a case of myxomatous degeneration of the aortic valve as an etiology of acute decompensated heart failure to highlight the importance of considering myxomatous degeneration as an underlying etiology of symptomatic aortic insufficiency.

Azithromycin-Induced Bradycardia.

Azithromycin is a broad-spectrum antibiotic of the macrolide class and has multiple effects on the cardiovascular system, including prolonged corrected QT (QTc) interval. However, there is limited literature on the association between azithromycin and bradyarrhythmias. Monitoring the patient via telemetry can detect bradycardia.

The SCN8A encephalopathy mutation p.Ile1327Val displays elevated sensitivity to the anticonvulsant phenytoin.

Objective: SCN8A encephalopathy (early infantile epileptic encephalopathy; EIEE13) is caused by gain-of-function mutations resulting in hyperactivity of the voltage-gated sodium channel Nav 1.6. The channel is concentrated at the axon initial segment (AIS) and is involved in establishing neuronal excitability.