Can you tell me if a heart attack stops your front chambers from working how does your heart function?

Poorly: Atrial chamber s are "upper" and with non function or fibrillation, cardiac function / output decreases but can be tolerated, reversed, treated etc. Ventricular chambers are lower and somewhat anterior, and if they decrease function, meds, treatments, surgery can help. If those chambers stop, cpr, defibrillation, and treatment saves some.