Cardiac Pacemaker Heart Rate Control for Chamber Remodeling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Individuals with a sedentary lifestyle often experience cardiac-related health issues due to reduced heart chamber sizes, which can lead to decreased cardiac output and impaired exercise capacity, particularly in cases of heart failure with preserved ejection fraction (HFpEF) associated with hypertension and left ventricular hypertrophy.
Innovation Solution
A cardiac pacemaker is designed to detect inactivity and increase the heart rate within a specific range (above 100 beats per minute and below 140 beats per minute) to promote heart muscle remodeling, mimicking the effects of exercise and improving cardiac output without causing discomfort, with sensors monitoring activity levels and adjusting heart rate accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the heart rate is increased to promote heart muscle remodeling, then heart chamber volumes increase and diastolic function improves, but this may induce heart failure or cause discomfort
Solution Approach 1:
The pacemaker dynamically adjusts heart rate based on real-time sensor feedback about the subject's activity level. During inactivity, the heart rate is increased to promote remodeling; during activity, the heart rate returns to normal levels, creating a dynamic adaptation that prevents heart failure while achieving therapeutic benefits
Solution Approach 2:
The system changes the heart rate parameter selectively based on activity state. By modifying only the heart rate parameter during inactivity periods and maintaining normal parameters during activity, the system achieves remodeling without inducing heart failure or discomfort
2Productivity
If the heart rate is increased above resting levels to remodel heart muscle, then cardiac output improves, but energy consumption increases
Solution Approach 1:
The pacemaker applies heart rate increases periodically only during detected inactivity periods rather than continuously. This periodic action pattern allows the heart to remodel during low-energy states while conserving battery power by not maintaining elevated heart rates during active periods when natural movement occurs
3Manufacturing precision
If sensors continuously monitor activity levels to adjust heart rate, then heart muscle remodeling is optimized, but device complexity increases
Solution Approach 1:
The pacemaker system monitors its own operational context through integrated sensors and automatically adjusts heart rate without external intervention. The device serves itself by detecting activity levels and making real-time decisions about pacing, eliminating the need for complex external control systems
Data Source
AI summary
According to some aspects, a cardiac pacemaker for implantation within a subject is provided, the pacemaker including a housing, at least one sensor configured to detect an activity level of the subject, and at least one processor coupled to the sensor configured to detect inactivity of the subject based on output from the at least one sensor, produce a first signal configured to increase the heart rate of the subject to a first heart rate during a first time period, wherein the first heart rate is above a resting heart rate and below 100 beats per minute, and in response to determining that the first time period has elapsed, producing a second signal configured to increase the heart rate of the subject to a second heart rate during a second time period, wherein the second heart rate is between 100 and 140 beats per minute.