The Self-Expandable Impella CP (ECP) as a Mechanical Resuscitation Device

Area of Science:

• Cardiovascular Medicine
• Medical Devices
• Emergency Medicine

Background:

• Conventional chest compressions have limited efficacy in improving cardiac arrest (CA) survival rates.
• Existing percutaneous left ventricular assist devices (pLVADs) require complex fluoroscopy-guided, guidewire-based insertion and have limited flow due to cross-sectional area.
• The self-expandable Impella CP (ECP) pLVAD offers guidewire-free placement and an increased pump cross-sectional area, addressing limitations of previous devices.

Purpose of the Study:

• To evaluate the feasibility of resuscitation using the novel Impella ECP pLVAD in a swine model of cardiac arrest.
• To assess the safety and efficacy of rapid, guidewire-free pLVAD placement in achieving return of spontaneous circulation (ROSC).

Main Methods:

• Eleven anesthetized pigs underwent electrically induced cardiac arrest and were untreated for 5 minutes.
• Percutaneous left ventricular assist device (pLVAD) insertion and activation using the Impella ECP were performed without a guidewire.
• Vasopressors were administered, defibrillations were attempted, and hemodynamic and echocardiographic assessments were conducted post-ROSC.

Main Results:

• Successful guidewire-free Impella ECP pLVAD placement was achieved in all animals.
• Resuscitation was successful in 75% of the animals, with an average of 3.5 defibrillations and 1.8 mg norepinephrine per ROSC.
• Hemodynamics remained stable after device removal, with no observed adverse effects or aortic valve damage.

Conclusions:

• The Impella ECP facilitates rapid, guidewire-free pLVAD placement in fibrillating hearts, enabling successful resuscitation.
• These findings support the potential for broader clinical adoption of the Impella ECP for cardiac arrest management.
• The Impella ECP represents a significant advancement in pLVAD technology for emergency cardiovascular support.