International journal of cardiology
-
Letter Case Reports
Coexisting vasospastic angina and undiagnosed Brugada syndrome resulting in cardiac arrest.
The coexistence of Brugada Syndrome and resting vasospastic angina resulting in cardiac arrest is rare. We describe a 64 year-old man presenting with cardiac arrest and vasospastic angina with diagnostic criteria of symptomatic Brugada Syndrome. Recognition of the coexistence of these potentially fatal conditions has important therapeutic implications when using calcium channel antagonists and may shed light on the mechanisms of coronary spasm. A common pathogenesis, such as a common underlying channelopathy, may explain its coexistence with Brugada Syndrome.
-
Letter Case Reports
Acute hyperkalemia and failure of pacemaker stimulus.
Acute hyperkalemia may induce well-known serious cardiac arrhythmia. However, ventricular aberration including concealed conduction may also occur. ⋯ Sodium bicarbonate allowed to restore sinus rhythm. Our report highlights that acute hyperkalemia may increase thresholds of pacemaker stimulus and physicians should be aware that complete block of conduction may occur despite correct pacemaker programming.