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Situational syncope is often triggered by urination, swallowing, or coughing. [2] Carotid sinus syncope is due to pressure on the carotid sinus in the neck. [2] The underlying mechanism involves the nervous system slowing the heart rate and dilating blood vessels, resulting in low blood pressure and thus not enough blood flow to the brain. [2]
Syncope (medicine) Syncope, commonly known as fainting or passing out, is a loss of consciousness and muscle strength characterized by a fast onset, short duration, and spontaneous recovery. [ 1] It is caused by a decrease in blood flow to the brain, typically from low blood pressure. [ 1] There are sometimes symptoms before the loss of ...
Heat syncope is fainting or dizziness as a result of overheating ( syncope is the medical term for fainting). It is a type of heat illness. The basic symptom of heat syncope is fainting, with or without mental confusion. [ 1] Heat syncope is caused by peripheral vessel dilation, resulting in diminished blood flow to the brain and dehydration .
Orthostatic syncope refers to syncope resulting from a postural decrease in blood pressure, termed orthostatic hypotension. [1] Orthostatic hypotension occurs when there is a persistent reduction in blood pressure of at least 20mmHg systolic or 10mmHg diastolic within 3 minutes of standing or being upright to 60 degrees on the head-up tilt table .
Sinus node dysfunction ( SND ), also known as sick sinus syndrome ( SSS ), is a group of abnormal heart rhythms ( arrhythmias) usually caused by a malfunction of the sinus node, the heart's primary pacemaker. [1] [2] Tachycardia-bradycardia syndrome is a variant of sick sinus syndrome in which the arrhythmia alternates between fast and slow ...
A drop attack is a sudden fall without loss of consciousness.Drop attacks stem from diverse mechanisms, including orthopedic causes (for example, leg weakness and knee instability), hemodynamic causes (for example, transient vertebrobasilar insufficiency, a type of interruption of blood flow to the brain), and neurologic causes (such as epileptic seizures or unstable vestibular function ...
Psychogenic non-epileptic seizures ( PNES ), also referred to as pseudoseizures, non-epileptic attack disorder ( NEAD ), functional seizures, or dissociative seizures,[ 2][ 3] are episodes resembling an epileptic seizure but without the characteristic electrical discharges associated with epilepsy. [ 4][ 3] PNES fall under the category of ...
Neurogenic shock is a distributive type of shock resulting in hypotension (low blood pressure), often with bradycardia (slowed heart rate), caused by disruption of autonomic nervous system pathways. [ 1] It can occur after damage to the central nervous system, such as spinal cord injury and traumatic brain injury.