Multiple. Shortness of breath at rest, inability to stand up from bed and walk ( ny class iv) accumulation of fluid starting with the legs up to the whole body and lungs causing crackle sounds in the chest, lowering of blood pressure, tahycardia ( unless taking beta blockers)and worsening of the kidney function and sometimes even worsening of the liver function ( because the congestion).
Swelling & breathing. Advanced heart failure symptoms include difficulty breathing (particularly if lying flat) and swelling (usually of the legs). The difficulty breathing and swelling are both related to fluid that "backs up" into the lungs and legs because the heart is not pumping blood effectively.