- What causes Torsades de Pointes?
- What medication should be considered for torsades de pointes?
- What triggers long QT syndrome?
- What are the 3 shockable rhythms?
- Why is pea not shockable?
- Do you have a pulse with torsades?
- What happens if you shock asystole?
- Can dehydration cause prolonged QT?
- Do you shock V fib?
- What does torsades feel like?
- Why is magnesium used for torsades?
- Is torsades VT or VF?
- Do you defibrillate torsades?
- Is polymorphic VT the same as torsades?
What causes Torsades de Pointes?
Common causes for torsades de pointes include drug-induced QT prolongation and less often diarrhea, low serum magnesium, and low serum potassium or congenital long QT syndrome.
It can be seen in malnourished individuals and chronic alcoholics, due to a deficiency in potassium and/or magnesium..
What medication should be considered for torsades de pointes?
Treatment of torsade de pointes includes: isoproterenol infusion, cardiac pacing, and intravenous atropine. Intravenous magnesium sulfate, a relatively new mode of therapy for torsade de pointes, was proven to be extremely effective and is now regarded as the treatment of choice for this arrhythmia.
What triggers long QT syndrome?
Causes of acquired long QT syndrome Certain antifungal medications taken by mouth used to treat yeast infections. Diuretics that cause an electrolyte imbalance (low potassium, most commonly) Heart rhythm drugs (especially anti-arrhythmic medications that lengthen the QT interval)
What are the 3 shockable rhythms?
Shockable Rhythms: Ventricular Tachycardia, Ventricular Fibrillation, Supraventricular Tachycardia.
Why is pea not shockable?
In PEA, there is electrical activity, but the heart either does not contract or there are other reasons this results in an insufficient cardiac output to generate a pulse and supply blood to the organs.
Do you have a pulse with torsades?
Today one needs to be aware that drug-induced long QT syndrome is common and hence, a thorough medication history must be obtained. Patients with torsade may be hypotensive, have a rapid pulse and have loss of consciousness.
What happens if you shock asystole?
A single shock will cause nearly half of cases to revert to a more normal rhythm with restoration of circulation if given within a few minutes of onset. Pulseless electrical activity and asystole or flatlining (3 and 4), in contrast, are non-shockable, so they don’t respond to defibrillation.
Can dehydration cause prolonged QT?
Electrolyte abnormalities Disturbances in the levels of ions such as sodium and potassium in your body due to conditions such as dehydration, severe diarrhea, and even eating disorders can cause long QT syndrome. The QT interval returns to normal when the ions get back to normal.
Do you shock V fib?
Once the rhythm is identified as ventricular fibrillation, a shock should be delivered immediately. There are 2 types of defibrillators in use: biphasic and monophasic. If a monophasic defibrillator is in use, 360 joules should be delivered to the patient.
What does torsades feel like?
You may suddenly feel your heart beating faster than normal, even when you’re at rest. In some TdP episodes, you may feel light-headed and faint. In the most serious cases, TdP can cause cardiac arrest or sudden cardiac death. It’s also possible have an episode (or more than one) that resolves quickly.
Why is magnesium used for torsades?
Magnesium is the drug of choice for suppressing early afterdepolarizations (EADs) and terminating the arrhythmia. Magnesium achieves this by decreasing the influx of calcium, thus lowering the amplitude of EADs. Magnesium can be given at 1-2 g IV initially in 30-60 seconds, which then can be repeated in 5-15 minutes.
Is torsades VT or VF?
Frequent PVCs with ‘R on T’ phenomenon trigger a run of polymorphic VT which subsequently begins to degenerate to VF. QT is difficult to see because of artefact but appears slightly prolonged (QTc ~480ms), making this likely to be TdP.
Do you defibrillate torsades?
Occasional patients will have recurrent episodes of torsades (“Torsades storm”). Each individual episode may be treated with magnesium or defibrillation, if needed (Treatment step #1 above). However, additional therapies are required to stop recurrence and end the storm.
Is polymorphic VT the same as torsades?
Polymorphic VT is defined as an unstable rhythm with a continuously varying QRS complex morphology in any recorded ECG lead. Polymorphic VT that occurs in the setting of QT prolongation is considered as a distinct arrhythmia, known as torsades de pointes.