Mark’s doctor found that he had severe plaque buildup inside his arteries. What procedure would Mark’s doctor recommend to treat his condition?

It would be hard knowing which procedure Mark would need, but here are some possible options: (this was copied from the University of California San Francisco, UCSF).

Explanation:

Angioplasty

Angioplasty, also called percutaneous transluminal coronary angioplasty or PTCA, involves inserting a long flexible tube called a catheter into a blood vessel through a small incision in your skin. The catheter has a deflated balloon on its tip. Once the catheter reaches the blocked blood vessel, the balloon is inflated and compresses the plaque against the sides of the blood vessel. The balloon may be inflated and deflated several times. Often, the procedure is done in conjunction with a small metal tube called a stent that is left in the artery to serve as a scaffold to keep the artery open and prevent the plaque from springing back toward the center of the vessel.

Coronary Artery Bypass Graft

Coronary artery bypass graft (CABG) surgery is an open-heart operation in which an artery or a piece of vein taken from your leg is attached to the blood vessel to detour blood around the blockage. During part of the operation, your heart will be stopped and a heart-lung machine will be used to pump your blood and help you breathe. As with most major large incision operations, it takes about six weeks to recover. CABG is the most successful and most common major heart surgery in the Western world.

Coronary Stent

A coronary stent is a small, latticed, high-grade stainless steel tube that is used to hold the coronary artery open and minimize the chance of abrupt closure after angioplasty. It is placed in the coronary artery using the same procedure as the angioplasty. The stent is typically positioned at the narrowed area of the artery. When the catheter's balloon is inflated, the stent expands and is pressed against the vessel wall. The balloon is deflated and withdrawn, leaving the stent permanently in place. After a stent is placed, you will be prescribed an antiplatelet medication, Clopidogrel, also known as Plavix, for one month. This is used to minimize the risk of clot formation in the stent while tissue grows around the stent to incorporate it into the blood vessel wall. Within a month, the body no longer "sees" the stent, and the medication is no longer needed. You should continue to take aspirin, if it has been prescribed, along with the Clopidogrel.

Rotational Atherectomy

Rotational atherectomy widens narrowed arteries using a high-speed rotational device to "sand" away plaque. This technique is used in particular situations, such as with plaque with large amounts of calcium or to widen blockages within a stent.

UCSF Health medical specialists have reviewed this information. It is for educational purposes only and is not intended to replace the advice of your doctor or other health care provider. We encourage you to discuss any questions or concerns you may have with your provider.

I'm not sure if this helps any, but I'm glad to try.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.