What does it mean to be hemodynamically unstable?

Question

What does that mean and what are some medical examples? Thanks

Answer 1

Non-convulsive status epilepticus (NCSE) is an increasingly recognized condition in non-epileptic intensive care patients and is seen in up to 8% of patients in coma. NCSE can be a challenging diagnosis because clinical features include altered mental status in the absence of convulsive activity.

In critical care patients, NCSE may be precipitated by a variety of conditions, such as infection, severe electrolyte disturbance, acute intoxication, sedative-hypnotics withdrawal and traumatic brain injury. However, NCSE following hemodynamically unstable atrial fibrillation has not been reported. This article describes a patient who developed NCSE after an episode of hemodynamically unstable atrial fibrillation resulting in systemic hypotension and cerebral hypoperfusion. Fosphenytoin failed to produce clinical improvement despite resolution of abnormal pattern on EEG, and complete recovery was achieved only after administration of lorazepam. In the intensive care patients, NCSE may occur following hemodynamic compromise, and cerebral hypoperfusion may play a role in precipitating NCSE. A high index of clinical suspicion is necessary to diagnose and treat NCSE, which may be rapidly reversed by the administration of benzodiazepines.

2006 APR 26 - (NewsRx.com) -- Fosphenytoin may cause hemodynamically unstable bradydysrhythmias.

According to recent research published in the Journal of Emergency Medicine, "The prodrug fosphenytoin (FOS) was recently introduced as an alternative to phenytoin (PTN) and has since become a first fine therapy for status epilepticus. Unlike PTN, FOS generally has been considered to be safe from cardiac toxicity. To better characterize cardiac toxicity associated with FOS administration, we performed a review of the Food and Drug Administration's Adverse Event Reporting System databank for reports of possible FOS toxicity from 1997-2002."

"There were 29 applicable reports of adverse cardiac events likely related to FOS infusion, including 10 cardiac deaths," said Bruce D. Adams at the Brooke Army Medical Center and collaborators in the U.S. "Among survivors, there were four cases of high-grade atrioventricular block, and five cases of transient sinus arrest. Our data suggest that FOS may produce more cardiac toxicity than previously thought. Clinicians should consider administering intravenous FOS in a monitored setting for selected high-risk patients.

Hope this helps in your research. I have added related links in the sources. Good luck.

Answer 2

The last guy left a pretty good answer, except that it's not very 'user-friendly.' And also that he probably meant 'myocardial infarction' (which is nerd-language for 'heart attack'), instead of 'myocardial function.' Anyways, when someone says that a person/patient is 'hemodynamically unstable' he/she usually means that they have reason to believe that the patient's blood is at risk of not being able to do its job. The blood supplies all the tissues of the body with oxygen and nutrients, and it has to rely on the heart and blood vessels to make sure it gets to all those tissues to do its job. Also, the blood itself can cause problems (anemia is an example). Anyways, like the other guy said, these problems are usually due to one of the following: the heart isn't pumping as well as it should, there's not enough blood, or the vessels have dilated and the blood is pooling in them, preventing good flow. Either way, this usually leads to lower pressure, which leads to poor flow. When there's poor/no flow past these tissues, they don't get the oxygen/nutrients they need, and they get injured and can die.

Answer 3

To be hemodynamically unstable, patients often have a fever, their heart rate is way too fast (blood won't have time to get enough oxygen in the lungs because the heart is pumping too fast) and the blood pressure is way too low. The patient can die at any time. The most dramatic example of a patient who is hemodynamically unstable is a patient in shock. There are several types of shock that can lead to hemodynamic instability:

Septic shock - a bacterial infection throughout the blood stream causing all of the above symptoms

Cardiogenic shock - after a heart attack - same deal - heart way too fast, blood pressure way too low.

Anaphylactic shock - a severe allergic reaction to something like a food product or a bee sting

Hope this helps!

Answer 4

The term “haemodynamic instability” is most commonly associated with an abnormal or unstable blood pressure, especially hypotension. Here, hemodynamic instability will be defined more broadly as global or regional perfusion that is not adequate to support normal organ function. This definition recognizes the obligation to insure adequate organ perfusion during the perioperative period.
Hope this helps
matador 89

Answer 5

This means vital signs are out of the normal range, and changing.
Of course normal range has some variations according to age and body build. When pulse is very fast and blood pressure is too low, these can be signs that there is not enough blood circulating. This is a dangerous situation (emergency) because when that happens, not enough oxygen is delivered to organs (brain, heart, kidneys,...) and damage can happen.
Examples: 1) a massive hemorrhage- if not stopped or if not treated, can lead to death.
2) septic shock- in this case there isn't a loss of circulating volume, but the tone in blood vessels is abnormal. Circulation is fast but does not meet the tissues' oxygen needs.
3) cardiac tamponade- a blockage in the pump (the heart) makes it impossible to supply enough blood for vital organs (including the heart itself)
4) neurogenic shock (acute lesion in the nervous system, causing altered tone in arterioles)

Answer 6

I google searched hemodynamic and this is what I found. As for the unstable part, I think that goes without definition.

Hemodynamics is an important part of cardiovascular physiology dealing with the forces the pump (the heart) has to develop to circulate blood through the cardiovascular system. Adequate blood circulation (blood flow) is a necessary condition for adequate supply of oxygen to all tissues, which, in return, is synonymous with cardiovascular health, survival of surgical patients, longevity and quality of life. To an outside observer (a physician or a nurse) these hemodynamic forces demonstrate themselves as blood pressure and blood flow paired values at different nodes of the cardiovascular system. We will concentrate on systemic hemodynamics - the blood pressure and blood flow at the output of the left heart. The interest in systemic hemodynamics is obvious: A significant majority of all cardiovascular diseases and disorders is related to systemic hemodynamic dysfunction. Hypertension and congestive heart failure are two best known systemic hemodynamic disorders.

Answer 7

That means either through trauma or disease your blood pressure is not sufficient to provide adequate blood circulation to vital organs and the brain that will sustain life.That can happen when you hemorrhage from a trauma,(remember the blood also carries the oxygen load from the lungs where the hemoglobin actually delivers it to the brain and body).have been severely ill with infection where you lost vital body fluids from nausea & vomiting and dehydration,&,fevers, etc.Thats called hypovolemic shock.Fluid recusitation will be required from IV fluids and or blood transfusions to get the body stable again.Many times this is fatal,despite excellent medical care. Take care. SW FNP

Answer 8

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It means the blood pressure is too low to a degree that tissues are not being perfused well. "Shock" infers a more extreme version. Low blood pressure can result from: (1) blood loss; (2) pump failure such as from myocardial function, arrhythmia, or valve disorder; or (3) decreased systemic vascular resistance which usually is from sepsis.

Answer 9

Hemodynamic Compromise

Answer 10

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What does it mean to be hemodynamically unstable?
What does that mean and what are some medical examples? Thanks