You have figured out how pulmonary arteriole vasoconstriction could lead to high vascular resistance and therefore high blood pressure in the pulmonary circuit. this high resistance is going to make it harder for the heart to push blood through the vessels, overworking the heart and leading to heart failure. which side of the heart is most likely to be overworked?

The answer would be the right side.

Blood to lungs is pumped by the right ventricle. When there is increased vascular resistance in the lungs, the pressure will be increased called pulmonary hypertension. This will cause the right ventricle need to exert more force than usual.
Left ventricle would be responsible for the blood flow to the body.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.