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Before cardiac arrest, the body is in a state of homeostasis. Arterial blood circulates appropriately through the body, supplying oxygen to tissues while the venous blood collects metabolic waste products to be utilized elsewhere and/or eliminated from the body. However, during cardiac arrest, the body is in circulatory and pulmonary arrest ...
Agonal respirations are commonly seen in cases of cardiogenic shock (decreased organ perfusion due to heart failure) or cardiac arrest (failure of heartbeat), where agonal respirations may persist for several minutes after cessation of heartbeat.
Lance–Adams syndrome (LAS) is a sequela of hypoxic encephalopathy due to respiratory arrest, airway obstruction, cardiac arrest, etc., several days after the onset of hypoxic encephalopathy. A condition that presents with functional myoclonus associated with increased cortical excitability in a few weeks.
Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching of a muscle, a joint, or a group of muscles, different from clonus, which is rhythmic or regular. Myoclonus (myo-"muscle", clonus "spasm") describes a medical sign and, generally, is not a diagnosis of a disease.
Patients with sustained ROSC generally present with post-cardiac arrest syndrome (PCAS). Longer time-to-ROSC is associated with a worse presentation of PCAS. [9] Lazarus phenomenon is the rare spontaneous return of circulation after cardiopulmonary resuscitation attempts have stopped in someone with cardiac arrest. This phenomenon most ...
Generalized myoclonus is commonly seen in comatose people following cardiopulmonary resuscitation (CPR) and is seen by some as an indication of catastrophic damage to the neocortex; myoclonus status in this situation can usually (but not always) be considered an agonal phenomenon. [8]
Cardiac arrest (also known as sudden cardiac arrest [SCA] [11]) is when the heart suddenly and unexpectedly stops beating. [ 12 ] [ 1 ] When the heart stops beating, blood cannot properly circulate around the body and the blood flow to the brain and other organs is decreased.
With the advent of these strategies, cardiac arrest came to be called clinical death rather than simply death, to reflect the possibility of post-arrest resuscitation. At the onset of clinical death, consciousness is lost within several seconds, and in dogs, measurable brain activity has been measured to stop within 20 to 40 seconds. [2]