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Supraventricular Tachycardia—(1)5 min consult
William L. Discepolo, M.D.Cardiac ElectrophysiologyPomona Valley Hospital
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Disclosures
None
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Case
77 Y/o female PHM: HTN, TIA, Rapid HB’s ER Visit and Admission OSH after
c/o CP, dyspnea, Tachycardia Tachycardia was treated in ER
medically and she was admitted for a Troponin 0.34
EKG Head CT: Normal Echocardiogram: LVEDD 44, LA
34, LVEF .60 Trace TR Left heart catheterization: Right
Dominant, LVEF 0.80, LVEDP14, 10% luminal irregularities
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The Consultation
Careful review of records FIND & Review: ECG,
Telestrip, Holter, Kardia strip, Applewatch/wearable…
4 ER visits +/- Multiple medications: BB, CCB
Tachycardia stops with an injectable medicine that makes her feel bad
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ECG: Baseline and Tachycardia I’ve Got It!
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Paroxysmal Supraventricular Tachycardia
Definition: Umbrella term to describe a
tachycardia with A/V rates>100bpm originating from tissue above HIS bundle
AT (focal/Multi), IST, Macroreentrant AT (AFL), JT, Accessory Pathway Mediated Tachycardias (AVRT) and AVNRT
Generally EXCLUDE AF
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SVT
Epidemiology Prevalence SVT: 2.29 per 1000 p Incidence SVT: 36 per 100000 py Women have 2x risk of men Middle-older aged favors
AVNRT, younger balance of AVNRT and AVRT (favors AVRT)
50,000 ER visits per year
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SVT
Impact on QOL: varies on frequency, duration, and Sx at rest or only with exertion
Documented SVT 38% Palpitations 22% Chest pain 5% Syncope 4% Afib 0.4% SCA 0.2% PSVT diagnosed as ANXIETY 54%
pts
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Medical Therapy for SVT (2015 Guidelines)
Hold still I can fix this…
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Office Consultation vs. Acute Bedside Management
Phone a friend… Shout out…50/50?Siri? Dr. Google?
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ACC/AHA Guidelines
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Mechanical pump with a wiring diagram
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EP Study
NSR SCL 771, PR 177, QRSD 74, QT
324; AH 78, HV 40 VAW 530 VAERP 700/500 AVN(FP)ERP 700/310 Isuprel was given
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A clue!!
ISUPREL
EP’s little helper
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Narrow Complex Tachycardia: TLC 270 (222 BPM) (No Pwave)
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Basics are essential
Where do I cut?
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AVNRT: Nodal Reentry Mechanism
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His Refractory PVC
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X ray imaging & Electro anatomical mapping
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Defining the Structure in KOCH triangle (AVN, CS Os, TCA)
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Ablate With Care: No Take Backsies
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Normal Conduction (FP & SP)
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Normal Conduction (FP) SP Blocked
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Summary
SVT: Multiple Mechanism (AT, AFL, AVNRT, Variety of AVRTs)
Each has unique, complex mechanism; the fundamentals of which are constantly being refined
Medical therapy is reasonably effective if we think about mechanism (Nodal dependence (CCB), AP involved (1C: Flecainide)
Catheter ablation is an effective and curative strategy
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EP
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THANK YOU
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Wash your hands!