The 3rd ^degree  AV block.

 Fever;

Positive blood culture for streptococcal infection;

New heart murmur;

Palpitations;

Prolonged electrical systole of ventricles.

 Ventricular pre-excitation;

 ST elevations with J wave;

The ^1st   degree AV block;

 Low voltage;

inherited arrhthmia

inflammation of cardiac muscle

drugs and toxins

idiopatic origin

genetic causes

The 3^rd degree AV block.

 Fever;

Positive blood culture for streptococcal infection;

New heart murmur;

Palpitations;