Comparison of Aspirin Alone Versus Low-Dose Rivaroxaban Plus Aspirin in Chronic Limb-Threatening Ischemia

The goal of this \*\*clinical trial\*\* is to compare the effectiveness of \*\*low-dose rivaroxaban plus aspirin versus aspirin alone\*\* in patients aged 40-70 years with \*\*chronic limb-threatening ischemia, diabetes mellitus, hypertension, and hypercholesterolemia\*\*. The main questions it aims to answer are: * Does low-dose rivaroxaban plus aspirin reduce \*\*major adverse limb events (MALE)\*\*, such as acute limb ischemia and amputation? * Does the combination therapy reduce \*\*major adverse cardiovascular events (MACE)\*\*, such as myocardial infarction and stroke, and improve limb-related outcomes? Researchers will compare \*\*low-dose rivaroxaban (2.5 mg twice daily) plus aspirin (75-100 mg daily)\*\* with \*\*aspirin alone\*\* to see if combination therapy provides better outcomes over a period of \*\*6 months\*\*. Participants will: * Undergo baseline clinical assessment, blood tests, ABPI/TBI, and Doppler/duplex assessment. * Be randomly assigned to either the rivaroxaban plus aspirin group or the aspirin-alone group. * Attend follow-up visits at specified intervals for assessment of \*\*WIFI score, ABPI, wound healing, MALE, MACE, and quality of life\*\*. * Be assessed for treatment compliance, side effects, and bleeding during follow-up.