Prominent auricular T waves (Ta) as an important guide to the diagnosis of alkalosis

Atrial rupture and sudden death following atrial infarction

We present a sudden-death case secondary to a right atrial rupture, occurring as a result of a myocardial infarction with very subtle clinical and electrocardiographical signs. This atrial infarction case illustrates the difficulty of diagnosis and also the serious consequences that can result from this medical condition. We review other potential complications which, in clinical practise, are not always attributed to their true origin.

Metastatic atrial tumor: case report with electrocardiographic-pathologic correlation

This report describes a case in which the pre-mortem diagnosis of a right atrial metastasis from a bronchogenic carcinoma was made on the basis of distinctive PR segment (atrial repolarization) changes and atrial arrhythmias. The differential diagnosis of such PR segment deviations also includes functional changes, pericarditis, atrial infarction, and other types of atrial injury.

Alternans of the repolarization wave in a case of hypochloremic alkalosis with hypopotassemia

A case of profound hypochloremic alkalosis with hypopotassemia is reported, showing electrocardiographic changes of electrical alternans of the repolarization wave (probably the U wave) without any change in the QRS complex. Transient concomitant P-pulmonale was noted. Hypopotassemia is discussed as a possible mechanism for the development of the electrical alternans.