[Transient Q-waves in coronary disease]. / Tranziens Q-hullámok coronariabetegségben.

The authors discuss the transient ischemic Q waves in various situations. Five cases are presented. Two patients had exercise-induced Q waves, one patient had right bundle branche block-dependent Q waves, one patient had transient Q waves after thrombolytic therapy and one patient had transient Q waves caused by Prinzmetal angina. Profound ischemia may not result in necrosis but may cause myocardial stunning. Myocardial stunning may be accompanied by deranged electrophysiologic activity with transient loss of electromotive forces.

[The use of adenosine in the diagnosis and treatment of cardiac arrhythmias]. / Adenozin alkalmazása a szívritmuszavarok diagnosztikájában és kezelésében.

The authors investigated the effect of adenosine or ATP on narrow QRS tachycardia in 56 pts, 3 pts with wide QRS tachycardia 9 pts with suspected latent preexcitation and 10 pts with PVC suspected to be ventricular parasystole. After the bolus iv. administration of adenosine or ATP every SVT was stopped related to AV node (44 pts), but in the rest twelve related to atrial origin of SVT only one automatic atrial tachycardia could be stopped. From the 9 patient suspected to have concealed WPW 2 pts had delta wave during the effect of adenosine, and in four pts parasystole was demonstrated among the pts had varying coupling interval PVC. None of the pts who had wide QRS tachycardia was the tachycardia stopped, but in two cases the supraventricular origin--atrial flutter and tachycardia--was discovered. The authors emphasize the favourable effect of adenosine in narrow complex tachycardia and suggest that it can given safely in wide QRS tachycardia of unknown origin either. The diagnostic effect of adenosine can be used in sinus rhythm too if latent preexcitation or ventricular parasystole is suspected.