Brugada sign unmasking the location of an acute myocardial infarction.

Two patients with acute myocardial infarction were admitted with unremarkable electrocardiograms, which did not reveal the location of the damage. A review of these electrocardiograms led to a suspicion of the presence of Brugada sign (BRSG), something subsequently confirmed by the administration of a sodium channel blocker. The unmasking of BRSG was unexpectedly accompanied by repolarisation abnormalities, showing ischaemia in the lateral wall, concordant with the distribution of the culprit vessels in the coronary angiogram.

Tricuspid annular respirophasic velocities in imminent tamponade.

A 57 year old woman, with newly diagnosed lung cancer and a large pericardial effusion in her echocardiogram, is presented in this case. No clinical or echocardiographic signs of tamponade physiology were initially detected. However, an excessive tricuspid annular respiratory fluctuation of the early diastolic velocity was noticed, which heralded the manifestation of overt tamponade on day 5.