摘要:
Systems and methods to inhibit the conduction of certain spurious electrical impulses in the heart. Inhibition of spurious electrical impulses in the heart is accomplished by cooling one or more targeted portions of the heart. Optionally, inhibition of spurious electrical impulses may be accomplished by cooling of cardiac tissue in combination with pacing of the heart.
摘要:
A system and method for managing and inhibiting cardiac remodeling in MI patients. Bi-ventricular stimulation is constantly provided with and without sensing to encourage normal pumping of the heart on a consistent basis. Pulses are administered using an anodal pulse followed by a cathodal pulse to stimulate cardiac muscle contraction. Stem cells are administered to MI areas to encourage regeneration of cardiac tissue in the damaged area. Stimulation may be provide to both healthy and compromised cardiac tissue.
摘要:
A cardiac contractile augmentation device (CCAD) comprising an EAP segment adapted to be attached to a portion of the heart that would benefit from contractile augmentation. The EAP segment is energized by a pulse generator. In response to an electrical pulse the EAP segment deforms resulting in a contraction of the portion of the heart to which the EAP fabric is attached. In response to another pulse from the pulse generator, the EAP segments returns to its pre-deformed state. A CCAD may be constructed of EAP segments that are independently energized under control of a processor that is connected to the individual segments. The processor causes the pulse generator to sequentially pulse the individual segments in the direction of a normal contraction of the cardiac tissue. In this way, the CCAP provides contractile augmentation to a chamber of the heart in a pattern that is equivalent to a concentric contraction of normal heart muscle. Sensors may be used to provide the processor data indicative of the state of the heart and the need for contractile augmentation. The CCAD may be configured as a cardiac patch, a cardiac wrap, or a cardiac envelope. The EAP segments may be energized during systole to augment the contractile strength of the heart. The EAP segments may also be energized during diastole to provide a passive restraint precisely calibrated to the degree of restraint desired. Moreover, the active cardiac envelope may be energized during both systole and diastole. Networks of EAP sensors and contractile device may be use to provide the sensing and contractile functionality. Alternatively, a dual function EAP may perform both sensing and contractile functions.
摘要:
Methods, apparatus, and systems are provided to stimulate multiple sites in a heart. A controller senses electrical activity associated with sinus rhythm of the heart. A signal generator is configured to generate an electrical signal for stimulating the heart. Based on the electrical signal, a distributor circuit then distributes the stimulating signals, such as pacing pulses, to a heart. The distributor circuit may vary the delay time between stimulating signals, inhibit a stimulating signal, trigger application of a stimulating signal, or vary the characteristics, such as the pulse width and amplitude, of a stimulating signal.
摘要:
Methods, apparatus, and systems are provided to stimulate multiple sites in a heart. A controller senses electrical activity associated with sinus rhythm of the heart. A signal generator is configured to generate an electrical signal for stimulating the heart. Based on the electrical signal, a distributor circuit then distributes the stimulating signals, such as pacing pulses, to a heart. The distributor circuit may vary the delay time between stimulating signals, inhibit a stimulating signal, trigger application of a stimulating signal, or vary the characteristics, such as the pulse width and amplitude, of a stimulating signal.
摘要:
A system and method for managing and inhibiting cardiac remodeling in MI patients. Bi-ventricular stimulation is constantly provided with and without sensing to encourage normal pumping of the heart on a consistent basis. Pulses are administered using an anodal pulse followed by a cathodal pulse to stimulate cardiac muscle contraction. Stem cells are administered to MI areas to encourage regeneration of cardiac tissue in the damaged area. Stimulation may be provide to both healthy and compromised cardiac tissue.
摘要:
Methods, apparatus, and systems are provided to control contraction of the heart. At least one sensing element receives signals indicating electrical activity of sinus rhythm of the heart. The electrical activity is monitored and analyzed to detect an event. In addition, the electrical activity is monitored to detect, for example, premature stimulation and contraction of a portion of the heart, such as the left ventricle. Contraction in the pre-excited portion of the heart is then suppressed using electrical pulses. The heart may then be allowed to contract naturally, or a stimulating pulse may be applied to assist the heart in contracting.
摘要:
Methods, apparatus, and systems are provided to control contraction of the heart. At least one sensing element receives signals indicating electrical activity of sinus rhythm of the heart. Based on the received signals, the progress of contraction of the heart is determined. Based on the progress of contraction, the chamber of the heart may then be stimulated at a plurality of locations. In another embodiment, a plurality of electrodes are implanted in the left ventricle to stimulate at multiple locations in the left ventricle for the purpose of improving hemodynamic performance and increasing cardiac output in a patient who is suffering from congestive heart failure. A pre-excitation voltage may be applied to pre-condition a portion of the heart. A stimulation pulse of increased current may also be applied to improve cardiac output.
摘要:
Methods, apparatus, and systems are provided to control contraction of the heart. At least one sensing element receives signals indicating electrical activity of sinus rhythm of the heart. The electrical activity is monitored and analyzed to detect an event. In addition, the electrical activity is monitored to detect, for example, premature stimulation and contraction of a portion of the heart, such as the left ventricle. Contraction in the pre-excited portion of the heart is then suppressed using, for example, one or more anodal electrical pulses. The heart may then be allowed to contract naturally, or a stimulating pulse may be applied to assist the heart in contracting.