pacemakers and AICD
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show | 1 = chamber paced
2 = chamber sensed
3 = response to sensing
4 = programability, rate modulation
5 = antitachycardia fxn.
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position V OF PACemakers are antitachycardia functions such as ? | show 🗑
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show | first three = antibradycardia fxn.
last two = programmability and antitachycardia fxn.
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show | fixed rate or asynchronious mode. may cause afib, aflutter and firing on T wave
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show | atrial demand or synchronious modes. it requires intact AV condution. can cause afib, aflutter. indications include sick sinus, sinys block/arrest.
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VVI, VVT, describes what modes in pacemakers? when is it indicated? | show 🗑
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show | when in need of atrial kick.
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VAT, VDD, DVI, DDD DEScribes what modes? this ensures what? patient must have what intact. in what type of patient is it used for? | show 🗑
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which type of patient is the VAT and VDD cant be used? | show 🗑
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WHICH mode result in AV sequential pacing? when is it indicated? | show 🗑
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show | normal av conduction with atrial bradycardia
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when is VDD indicated? | show 🗑
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show | the piezoelectric sensors.
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show | R. I.E. VVIR, DVIR, DDDR.
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show | 1. rate upper and lower limit
2. stimulus output volts, ma
3. sensitivity mv
4. refractory periods
5. antitachycardia modes either on or off.
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show | potassium
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a patient with syncope, dizzines, fatigue, chest pain with pacemaker. what do you suspect? | show 🗑
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the pacemaker is usually placed over the pectoralis muscle often have what problems? what can be utilized instead? | show 🗑
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during surgery, pacemakers should be assumed as what? | show 🗑
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show | magnets should not be routinely use especially in the presence of cautery for risk of reprogramming of the pulse generator, but always available.
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what should be avoided during surgery as they can inhibit demand pacemakers? | show 🗑
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what are best uses of electrocautery during surgery with pacemakers? | show 🗑
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prior to surgery patients with rate responsive pacemakers needs what changes? | show 🗑
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patients with VDD and DDD SHould have what done prior to surgery? | show 🗑
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patients with pacemakers about to be defribilated, what should not be done? | show 🗑
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patients with pacemakers about to have lithrotipsy, what should be ensured? | show 🗑
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how can a patient with pacemaker undergo MRI? | show 🗑
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A PATient with pacemaker underwent radiotherapy. what should be ensured? | show 🗑
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show | hypokalemia can lead to loss of capture and hyperkalemia can lead to ventricular irritab9ility.
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show | 1. any bradycardia with heart block
2. third degree block
3. symptomatic bradycardia
4. symptomatic bifascicular block
5. acute MI with second degree Mobitz type 2 block.
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how many spikes are there with AV sequential pacemaker? | show 🗑
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when a magnet is applied to a demand pacemaker what usually happens? | show 🗑
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show | apply magnet.
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what are the causes of heart block? | show 🗑
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show | sick sinus syndrome. - failure to activate the rest of the atrium leading to severe persistent bradycardia.
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what is made up of unifascicular block? | show 🗑
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show | LA hemiblock - left axis deviation and slight qrs widening.
left posterior hemiblock - right axis deviation and widened qrs.
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show | in the presence of LBBB.
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show | LBBB - severe cad, htn, lvh
rbbb - does not imply CAD.
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ekg sign of bifascicular block? | show 🗑
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show | 1. survived from sudden death
2. sustaine VTACH
3. SYncope due to V TACH
4. arrythmia not amendable with ablation.
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the functions of ICDs? | show 🗑
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anesthetic management of patients with ICD? | show 🗑
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magnet placed over ICDs can cause what? | show 🗑
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what are the ways to deactivate an icd? | show 🗑
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show | icd can interpret electrocautery as dysrythmia and discharge.
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what should be available intraoperatively with a patient with ICD? | show 🗑
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what should be avoided with icd? | show 🗑
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show | consult cardiologist preoperatively.
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what are the preoperative evaluation of a patient with a CRMD? | show 🗑
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show | 1. availability of external pacer/defibrilator
2. if EMI to be used, determine if reprogramming, conversion to asynchronous mode, and or disabling rate responsive function is an advantage.
3. in general suspend antiarrythmia function
4. use bipolar.
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show | avoid direct contact with pulse generator and leads. keep the radiofrequency current path as far as possible from the the crmd.
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show | 1. if the lithotripsy triggers on the r wave, atrial pacing should be disabled
2. consult cardiologist
3. avoid the beam on or near the pulse generator.
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show | is generally safe, if the radiation field is in the generator field, the generator should be removed and placed elsewhere.
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show | with convert the pacemaker from demand to asynchronious mode.
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show | magnet should be avoided since pacing function for bradycardia is unaffected and defibrillation may be necessary.
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with regard to magnet use on medtronic pacemakers? | show 🗑
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show | when magnet is used, the boston scientific is programmed to switch to 1. asynchroneous mode, do nothing mode, e-gram mode.
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show | check for battery life over the telephone by provider.
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show | asynchroneous mode.
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what is the use of the 'do nothing mode' of boston scientific pacers? | show 🗑
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what is the use of the boston scientific of store e-gram mode/ | show 🗑
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show | a cardiologist should make recommendations, and not advisable to routinely convert pacers to asynchroneous mode with a magnet.
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what recommendations are made to electrocautery when patients are with pacers? | show 🗑
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patient in preop area has pacemaker. the heart rate is currently instrinsic and over the pacer rate, how do you check if the pacer still is functioning? | show 🗑
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how do you inhibit myopotentials from triggering pacers? | show 🗑
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what disease/pathologic process may cause a generator pulse pacer failure to reach treshold? what can you do? | show 🗑
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show | if electrodes in atrium will create p waves.
if electrodes in ventricle will create LBBB if in right ventricle, and RBBB if in left ventricle.
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Created by:
michelledaryanani