Living with a Mechanical Heart (LVAD): Daily Use, Battery Changes, and Device Maintenance

Introduction

A Left Ventricular Assist Device (LVAD) — commonly referred to as a mechanical heart or artificial heart pump — is a surgically implanted device that helps a weakened heart pump blood to the rest of the body. LVADs are used in patients with advanced heart failure as a bridge to heart transplantation, a bridge to recovery, or as destination therapy for patients who are not transplant candidates.

Modern LVADs such as the HeartMate 3 and HeartWare HVAD have transformed the lives of patients with end-stage heart failure. However, living with an LVAD requires significant lifestyle adjustments, daily device management, and a thorough understanding of the equipment. This guide provides a practical overview for patients and caregivers.

Understanding Your LVAD System

A typical LVAD system consists of:

• The pump: Implanted inside the chest, connected to the left ventricle and the aorta. It continuously moves blood forward.
• The driveline: A cable that exits through the skin of the abdomen, connecting the internal pump to the external controller and power source. This is the most vulnerable part of the system.
• The system controller: A small external computer worn on the body that monitors pump function, displays alarms, and controls device settings.
• Power sources: Rechargeable batteries (for mobility) and an AC power module (for use at home when plugged into the wall).

Part 1: Daily Life with an LVAD

General Daily Routine

• Check the controller display every morning: Verify that pump speed, flow, and power readings are within your prescribed normal range. Record readings in your device log if instructed by your care team.
• Inspect the driveline exit site daily: Look for redness, swelling, discharge, or any change in the skin around where the driveline exits the body. Report any abnormalities to your LVAD coordinator immediately.
• Wear your equipment securely: The controller and batteries should be worn in the provided holster or vest at all times. Never let the controller hang freely or be placed where it could be dropped.
• Always carry backup batteries: Never leave home without at least one fully charged spare set of batteries.
• Avoid water immersion: Showers are permitted with a waterproof driveline cover; baths, swimming, and hot tubs are strictly prohibited. Water damage to the controller or driveline can be life-threatening.

Activity and Exercise

• Light to moderate exercise (walking, stationary cycling) is encouraged and improves outcomes
• Avoid contact sports, heavy lifting (>10 kg), and activities with risk of falls or chest impact
• Always exercise with a companion who knows how to respond to LVAD alarms
• Avoid activities that could pull or stress the driveline

Driving

Driving restrictions vary by country, device type, and individual clinical status. In most centers, driving is prohibited for at least 3–6 months post-implant and may remain restricted depending on arrhythmia history and local regulations. Discuss this specifically with your LVAD team.

Travel

• Always carry a letter from your LVAD center explaining your device for airport security (the LVAD will trigger metal detectors)
• Request manual screening rather than full-body scanners at airports
• Carry sufficient batteries for the entire journey plus extra
• Identify LVAD-capable hospitals at your destination before traveling
• Never travel without your backup equipment bag

Part 2: Battery Management and Power Changes

Battery management is one of the most critical daily skills for LVAD patients. Running out of power is a life-threatening emergency.

Battery Basics

• Most LVAD systems use two batteries simultaneously, providing 10–14 hours of power depending on battery age and pump settings
• Batteries must be charged daily — establish a consistent charging routine
• Battery life decreases over time; older batteries hold less charge. Replace batteries as recommended by your care team (typically every 1–2 years)
• Always check battery charge level before leaving home

How to Change Batteries (General Principles)

Note: Always follow the specific instructions provided by your LVAD manufacturer and care team. The following are general principles.

1. Prepare before disconnecting: Have the new fully charged batteries ready and within reach before beginning the swap.
2. Change one battery at a time: Never disconnect both batteries simultaneously. The pump must remain powered at all times. Disconnect one battery, connect the new battery, then repeat for the second.
3. Listen for confirmation: The controller will typically beep or display a confirmation when a new battery is properly connected.
4. Check the controller display: Confirm the new battery is recognized and showing adequate charge.
5. Place the used battery on the charger immediately: Establish a habit of charging used batteries right away so they are always ready.

When to Switch to AC Power

• Use the AC power module (wall power) whenever you are at home and stationary — sleeping, watching TV, working at a desk
• This conserves battery charge for when you need mobility
• Ensure your AC power cable is long enough to allow comfortable movement within your home
• Have a backup AC power module in case of cable failure

Power Emergency Protocol

If both batteries are critically low and AC power is unavailable:

• Sit or lie down immediately to reduce cardiac demand
• Call emergency services (120 in China) and your LVAD coordinator simultaneously
• Do not panic — the pump will continue running until power is completely exhausted
• If a bystander is present, direct them to retrieve backup batteries from your emergency bag

Part 3: Driveline Care and Maintenance

The driveline exit site is the most common source of serious LVAD complications, including infection. Meticulous daily care is essential.

Daily Driveline Exit Site Care

1. Wash hands thoroughly before touching the driveline or exit site.
2. Inspect the exit site: Look for redness, warmth, swelling, crusting, or discharge. Photograph the site regularly to track any changes.
3. Clean the exit site as instructed by your LVAD team — typically with chlorhexidine solution or sterile saline, using sterile technique.
4. Apply a fresh sterile dressing and secure the driveline to prevent tension or pulling on the exit site.
5. Immobilize the driveline: The driveline must be secured to the body at all times to prevent movement at the exit site, which causes trauma and increases infection risk.

Signs of Driveline Infection — Seek Immediate Care

• Increasing redness, warmth, or swelling at the exit site
• Purulent (pus-like) or foul-smelling discharge
• Fever above 38°C
• Pain or tenderness along the driveline tract
• Any change from the baseline appearance of the exit site

Protecting the Driveline

• Never pull, bend sharply, or place tension on the driveline
• Secure the driveline with the provided stabilization device or medical tape at all times
• During showering, use the waterproof driveline cover provided by your center; ensure it is properly sealed before water exposure
• Avoid clothing with tight waistbands or belts that press on the driveline

Part 4: Understanding and Responding to Alarms

LVAD controllers are programmed to alert patients and caregivers to problems. Understanding alarm types is essential.

Common Alarms and Responses

• Low battery: Connect to AC power or swap to charged batteries immediately
• Disconnected battery: Reconnect the battery; ensure it clicks into place
• Low flow: Sit or lie down; ensure adequate hydration; call your LVAD team if it persists
• Suction event: The pump is drawing in too little blood — lie down, increase fluid intake, call your team
• Controller malfunction: Switch to your backup controller immediately; call your LVAD team

Always carry your LVAD emergency card and your LVAD coordinator's contact number at all times.

Part 5: Medications and Anticoagulation

All LVAD patients require lifelong anticoagulation to prevent blood clots forming in the pump.

• Warfarin (Coumadin) is the standard anticoagulant for most LVAD patients; INR must be maintained within a specific target range (typically 2.0–3.0, device-dependent)
• INR must be checked regularly — typically weekly when stable
• Aspirin is also prescribed in most patients
• Never stop anticoagulation without consulting your LVAD team — pump thrombosis is a life-threatening complication
• Inform all healthcare providers (dentists, surgeons) that you are on anticoagulation and have an LVAD before any procedure

LVAD Care in Shanghai

Shanghai has several cardiac centers with experience in LVAD implantation and follow-up care:

• Zhongshan Hospital (中山医院): One of China's leading cardiac surgery centers with LVAD implantation and follow-up programs
• Ruijin Hospital (瑞金医院): Strong cardiac surgery and heart failure management team
• Shanghai Chest Hospital (上海市胸科医院): Specialized thoracic and cardiac center
• Renji Hospital (仁济医院): Experienced cardiac surgery and heart transplant program

China Medical Concierge Shanghai (CMCS) helps international LVAD patients navigate follow-up care in Shanghai, including coordinating LVAD clinic appointments, INR monitoring, driveline care consultations, and emergency support — all with full medical translation.

Contact Us

• Email: contract@medicalsh.com
• WhatsApp: https://wa.me/message/3AM6KAGCW2BAD1
• Website: www.medicalsh.com