West Affum Holdings Corp.

Nikolai Korsun

Joseph Leo Sullivan

David Peter Finch

Laura Marie Gustavson

Phillip Dewey Foshee, Jr

Gregory T Kavounas

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.

WCD system operable to not alarm when detected cardiac arrhythmias are not validated

In some embodiments, a wearable cardioverter defibrillator ('WCD') system comprises a support structure configured to be worn by a patient, a power source, an energy storage module configured to be coupled to the support structure, to be charged from the power source and to store an electrical charge, a discharge circuit coupled to the energy storage module, the discharge circuit controllable to discharge the electrical charge so as to cause a shock to be delivered to the patient, a measurement circuit configured to render a physiological input from a patient physiological signal, a user interface configured to output one or more human-perceptible indications, and a processor. The processor can be configured to detect a cardiac arrhythmia of the patient from the physiological input, determine whether a type of the cardiac arrhythmia is at least one of a first type ('CA1') and a second type (&#x201c;CA2&#x201d;), if the type is CA1, cause a first human-perceptible indication to be output, else if the type is CA2, cause a second human-perceptible indication to be output, the second human-perceptible indication being different from the first human-perceptible indication, and then control the discharge circuit to deliver a shock responsive to the cardiac arrhythmia.

Wearable cardioverter defibrillator (WCD) system informing patient that it will not shock responsive to just-self-terminated cardiac arrhythmia

A wearable cardioverter defibrillator ('WCD') system may output a loud sound after detecting and validating a shockable cardiac arrhythmia. In such embodiments, however, the WCD system might not sound a loud alarm before validating the arrhythmia thoroughly, i.e. for a longer time, thus giving the arrhythmia a further chance to self-terminate. The WCD system may thus detect more robustly the cardiac arrhythmias that do not self-terminate quickly. Such arrhythmias that self-terminate quickly may occur from likely harmless events occurring multiple times in the daily life of the patient, such as the patient becoming 'winded' from climbing stairs. In embodiments the WCD system may notify the patient only discreetly, or even not at all. The lack of sounding such a loud alarm responsive to such events reduces the overall number of times in which the patient experiences unwanted attention by others, embarrassment, loss of privacy and dignity, and so on.

WCD system validating detected cardiac arrhythmias thoroughly so as to not sound loudly due to some quickly self-terminating cardiac arrhythmias

In some embodiments, a wearable cardioverter defibrillator ('WCD') system may output a closing human-perceptible indication, after detecting a shockable cardiac arrhythmia, and after further determining that it will not shock. This may succeed in informing the patient that the WCD system will not deliver a shock responsive to the cardiac arrhythmia, which may have just self-terminated. The information may give comfort to the patient who may be conscious, and may recognize that his or her ventricular tachycardia has self-terminated. Moreover, the patient will know that he or she will not be unnecessarily shocked while conscious, and will not even need to press a cancel switch.

In some embodiments, a wearable cardioverter defibrillator ('WCD') system may output an opening human-perceptible indication, after detecting a shockable cardiac arrhythmia but before validating it. This may succeed in informing the patient that the WCD system is working, and in particular analyzing a just-detected cardiac arrhythmia. The information may give comfort and confidence to the patient who may be conscious, and be experiencing only ventricular tachycardia but not ventricular fibrillation.

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Lynwnwood, WA, United States of America

Nikolai Korsun