idiopathic origin

inflammation of cardiac muscle

inherited arrhythmia

drugs and toxins

genetic causes

vegetations on cardiac valves. 

progressing heart failure;

cardiac syncope;

nightmares; 

heart murmur;

Neonates – ductal dependent congenital heart diseases;

Little children – generalized infections (s., sepsis);

Infants – myocarditis;

Adolescents – drug abuse;

School age children – arrhythmias.

Prolonged electrical systole of ventricles.

 Ventricular pre-excitation;

The 1^st.  degree AV block;

 ST elevations with J wave;

 Low voltage;