Prva prezentacija akutne srčane slabosti kod mladog bolesnika/First presentation of acute heart failure in a young patient Marija Polovina (Belgrade, RS) Akutna srčana slabost: šta se krije iza troponina preko 20,000 ng/L/Acute heart failure: what hides behind a troponin level over 20.000 ng/L Slobodan Klašnja (Belgrade, RS) Akutna srčana slabost: zašto je etiologija važna?/Acute heart failure: importance of understanding the underlying mechanisms Marija Zdravković (Belgrade, RS)