Baroreflex Activation Therapy for Left Ventricular Function
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Solution Overview
Problem
Patients with systolic heart failure experience reduced left ventricular function due to impaired cardiac excitation-contraction coupling and decreased nitric oxide synthase levels, leading to complications such as pulmonary edema and peripheral edema, for which current drug therapies have limitations and side effects.
Innovation Solution
The use of baroreflex activation therapy, involving a system with electrodes and a control system that stimulates baroreceptors to improve left ventricular function through electrical, mechanical, thermal, or chemical means, potentially normalizing gene expression of nitric oxide synthases and β-adrenergic receptor signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drug therapies are used to directly stimulate cardiac tissue and increase contractility, then cardiac output is improved, but side effects and treatment limitations occur
Solution Approach 1:
The patent uses baroreceptors as an intermediary element in the cardiovascular reflex arc. By stimulating baroreceptors, the therapy activates endogenous neural pathways (via the nucleus tractus solitarius and vagus nerve) that indirectly improve cardiac function, rather than directly administering drugs to cardiac tissue. This intermediary approach bypasses the harmful side effects of direct cardiac stimulation while achieving therapeutic goals through physiological reflex mechanisms.
2Reliability
If conventional therapies are used to treat systolic heart failure, then some symptomatic relief is achieved, but the underlying left ventricular dysfunction is not adequately addressed
Solution Approach 1:
The patent changes the therapeutic parameter from direct cardiac stimulation to baroreceptor activation. By stimulating baroreceptors with electrical, mechanical, thermal, or chemical means, the therapy modifies neural signaling parameters that subsequently regulate cardiac function. This parameter change enables treatment of systolic heart failure through a different physiological pathway, improving reliability by addressing the underlying dysfunction rather than just symptoms.
3Adaptability or versatility
If multiple stimulation modes are available for baroreflex activation, then treatment versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a multi-functional baroreflex activation device that can deliver electrical, mechanical, thermal, or chemical stimulation through a single integrated system. The device includes multiple electrodes and control systems that can switch between different stimulation modes, allowing one device to perform multiple therapeutic functions. This universality achieves treatment versatility while managing device complexity through shared hardware components and control architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves left ventricular function and structure by enhancing cardiac output and reducing pressures, confirmed through hemodynamic and angiographic measurements, and may be combined with pharmacological agents for enhanced efficacy.
Implementation Method 1
The stimulation provided by the baroreflex activation device may be any suitable stimulation. For example, it can be electrical stimulation, mechanical stimulation, thermal stimulation, chemical stimulation, or combinations thereof.
Data Source
AI summary
Described here are devices, systems, and methods for improving left ventricular function in a patient with systolic heart failure with left ventricular dysfunction using baroreflex activation therapy. In general the systems have at least one electrode and a control system in communication with the electrode, the control system including a processor and memory, wherein the memory includes software defining a stimulus regime configured to effect improvement in left ventricular function. The methods for improving left ventricular function in a subject typically include identifying a patient in need of left ventricular function improvement and stimulating a baroreceptor with a baroreceptor activation device to improve left ventricular function.