This document discusses, among other things, systems and methods to determine an indication of contractility of a heart of a patient using received physiologic information, and to determine blood pressure information of the patient using the heart sound information and the determined indication of contractility of the heart. The system can include an assessment circuit configured to determine an indication of contractility of a heart of the patient using first heart sound (S1) information of the patient, and to determine blood pressure information of the patient using second heart sound (S2) information of the patient and the determined indication of contractility of the heart.

The invention relates to a device for assisting a first aider with a cardiopulmonary resuscitation of a person suffering cardiac arrest, comprising a transport housing (1), in which a sensor apparatus (4) and two adhesive electrodes (2), which are or can be connected to the sensor apparatus (4), can be stowed. The sensor apparatus (4) allows data to be acquired while the first-aid measures for resuscitation are performed. The sensor apparatus (4) comprises an adhesive (5) for attachment to the chest of the patient (3). The chest compressions, i.e. depth of compression and compression frequency, can be detected by means of a motion sensor. An interface for data transfer allows wireless communication with a mobile terminal (6). Furthermore, the sensor apparatus (4) contains a high-voltage store so that, after connection to the adhesive electrodes (2), a single defibrillation shock can be delivered.

A Wearable Medical System (WMS) includes one or more pacing capabilities. The WMS may detect when the patient's heart rhythm starts to deteriorate, but not necessarily in a way that requires defibrillation. In particular, the WMS may detect bradycardia of one or more types, and then confirm the detection before pacing to treat the detected bradycardia.

A wearable cardioverter defibrillator (WCD) comprises a support structure to be worn by a patient, an energy storage module to store an electrical charge, a discharge circuit coupled to the energy storage module, a measurement circuit, a user interface that includes a speaker, and a processor. The processor is configured to monitor a physiological signal of a patient with the measurement circuit to detect cardiac arrhythmia when the patient is wearing the support structure, determine whether a validation criterion is met in response to detection of a cardiac arrhythmia, provide no alarm with the user interface the validation criterion is being determined, and cause a shock to be delivered to the patient from the energy storage module by the discharge circuit in the event the validation criterion is met.

A heart rate (HR) monitor for use in a medical device configurable to measure a patient's ECG such as, for example, a WCD system. Embodiments can include an ECG sensor and a processor configured with classification criteria to classify a received ECG signal into one of a plurality of ECG rhythm types each with a corresponding algorithm to determine the patient's heart rate. The processor uses the classification criteria to identify the ECG signal's type and determine a heart rate of the patient using the corresponding algorithm. The HR monitor is configurable to avoid overcounting of erroneous measurements of R-R intervals that can result from large T-waves and/or bigeminy by comparing the mean of even R-R intervals with the mean of odd R-R intervals. If the means are significantly different double counting or bigeminy is indicated and the HR calculation is adjusted accordingly.

A wearable cardioverter defibrillator (WCD) system is configured to selectively provide cooling and/or heating to a component of the WCD system. In some embodiments, a Peltier device is used to provide the cooling to wearer of the WCD at or near where the WCDs defibrillation electrodes are positioned proximate or contacting the patient's body.

A system including a medical device is provided. The medical device includes at least one sensor configured to acquire first data descriptive of a patient, first memory storing a plurality of templates, and at least one processor coupled to the at least one sensor and the first memory. The at least one processor is configured to identify a first template of the plurality of templates that is similar to the first data, to determine first difference data based on the first template and the first data, and to store the first difference data in association with the first template. The system may further include the programmable device.

A system includes a medical device that uses a plurality of expendables each having an expiration date, and a computer that can be connected for communication to the medical device. The medical device includes an acquisition unit configured to acquire expiration information relating to an expiration date of a first expendable included in the plurality of expendables in a state that the medical device is not connected to the first expendable, and a transmission unit configured to transmit the expiration information acquired by the acquisition unit. The computer includes a reception unit configured to receive the expiration information, and a managing unit configured to manage the expiration date of the first expendable on the basis of the expiration information received by the reception unit.

An external defibrillator comprises an energy storage module, a discharge circuit, electrodes, a measurement circuit to sense contemporaneously a first ECG signal from a first vector and a second ECG signal from a second vector, and a subsequent ECG signal, and a processor. The processor is configured to multiply values of the first ECG signal with values of the second ECG signal to derive a product waveform, detect, in the product waveform, peaks that exceed a detection threshold, measure durations of time intervals between pairs of successive detected peaks, compute a heart rate of the patient from the measured durations of the time intervals, determine from the subsequent ECG signal whether a shock criterion is met, and when met, control the discharge circuit to discharge a stored electrical charge to deliver a shock to the patient. A communication module is configured to transmit the computed heart rate.

Representative embodiments of the present invention provide for novel, minimally invasive implantable devices and methods for targeted tissue drug delivery of cardiovascular drugs.