Coronary artery bypass graftis a surgery to create a bypass to supply blood to the heart by connecting a catheter that can replace the narrowed coronary artery (used by separating the radial artery near the wrist and saphenous vein on the inside of the leg, etc.).

Side Effects/After effects

• - Mortality of 2-5%and postoperative bleeding
• - In the long term, arterial and venous catheters at the surgical site may become blocked

Arteriovenous fistula surgery is a surgery that connects the artery and the superficial vein to expand the vein to pass a large amount of blood and to make it strong like an artery during continuous hemodialysis in patients with chronic renal failure.

Side Effects/After effects

• - Swelling at the surgical site due to pressure differences in the connected blood vessels
• - Reoperation required if not thick enough to be used for vascular dialysis