| Features | Angiography | Angioplasty |
| Purpose | Diagnoses artery narrowing or blockage | Treats narrowed or blocked arteries |
| Type | Diagnostic procedure | Treatment procedure |
| Method | Uses contrast dye and X-ray imaging | Uses a balloon to widen the artery |
| Stent | Does not usually involve stent placement | May involve placement of a coronary stent |
| Outcome | Helps identify the location and severity of blockage | Helps improve blood flow through the treated artery |
| Features | Angioplasty | Bypass Surgery |
| Approach | Minimally invasive catheter-based procedure | Open-heart surgical procedure |
| How it works | Widens the blocked artery, often using a stent | Creates a new route around blocked arteries |
| Number of blockages | Often suitable for selected blockages | May be considered for multiple complex blockages |
| Recovery | Usually involves a shorter recovery period | Generally requires a longer recovery period |
| Treatment choice | Depends on blockage location and complexity | Depends on disease severity, heart function and overall health |