🫀 The intra-aortic balloon pump (IABP) is a mechanical circulatory support device used in critical care to augment diastolic aortic pressure, thereby improving coronary and cerebral blood flow. ⚡ It serves as a bridge to recovery or definitive therapy (e.g., PCI, transplant, LVAD) in unstable patients.

ℹ️ About

The IABP works by inflating during diastole to increase aortic pressure (improving coronary perfusion) and deflating just before systole to reduce afterload and myocardial oxygen demand.
Overall effect: ↑ myocardial oxygen supply, ↓ myocardial oxygen consumption.
Best results are in patients with some residual LV function-ineffective in profound cardiac standstill.

🛠️ Method

A balloon catheter (usually 35–50 ml) is inserted via the femoral artery and positioned in the descending thoracic aorta, just distal to the left subclavian artery.
Helium is used for rapid inflation/deflation due to its low density and rapid diffusibility.
Inflation occurs at the dicrotic notch on the arterial waveform (early diastole), and deflation just before systole (end-diastole).
Synchronization is guided by ECG or arterial pressure waveform.

📋 Indications

🔄 Bridge to Transplant / LVAD: Advanced heart failure patients awaiting definitive therapy.
💔 Cardiogenic Shock: Particularly post-MI to stabilize perfusion.
🔥 Refractory Unstable Angina: When ischemia persists despite maximal medical therapy.
🩺 Mechanical Complications of MI: e.g., papillary muscle rupture, VSD (as a bridge to surgery).

⛔ Contraindications

🚫 Aortic Regurgitation: Worsens regurgitant flow as diastolic pressure is increased.
🚫 Aortic Dissection / Aneurysm: Can propagate dissection or rupture aneurysm.
🚫 Severe Peripheral Vascular Disease: Cannulation may be technically impossible or cause severe ischemia.

⚠️ Complications

🩸 Vascular Injury: Limb ischemia, femoral artery occlusion, haematoma.
🫀 Aortic Dissection / Rupture: Rare but catastrophic complication.
🧠 Stroke / Embolism: Due to dislodgement of aortic plaques or thrombus formation.
🦠 Infection: At insertion site or catheter-related sepsis.
🔌 Device Failure: Malposition or rupture of balloon.

📚 Exam Tip: IABP inflates in diastole (improves coronary perfusion) and deflates just before systole (reduces afterload). 💡 If you see a patient in cardiogenic shock post-MI with poor perfusion → think of IABP as a bridge until revascularization or transplant.

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Intra Aortic Balloon Pump

ℹ️ About

🛠️ Method

📋 Indications

⛔ Contraindications

⚠️ Complications

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