The medical finding of the patient diagnosed with the heart failure demanding the attention of the doctor is the crackles in the both lung bases. This is a sign of the lung congestion. The patient is suffering from the congestive heart failure. The congested lungs are mostly a result of the accumulation of the blood back into the veins taking blood through a person's lungs because the heart is unable to pump it efficiently to the body. The increased pressure in these veins makes the fluid to flow in the alveloi leading to low levels of oxygen making it difficult for the person to breathe.
Hence, the answer is 'lung congestion'.