management of svt: feel the burn
TRANSCRIPT
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Management of SVT:
Feel the BurnFeel the BurnDavid A. Sandler, MD, FACC, FHRS
Director, Heart Rhythm Service
Oklahoma Heart Institute
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Disclosures
• Speaker
• BiosenseWebster
• Bristol-Myers Squibb
• JanssenJanssen
• Pfizer
• St Jude Medical
• Advisory Board
• Boston Scientific
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Agenda
• Definitions/Diagnosis
• Acute Treatment
• Long-Term TherapyLong-Term Therapy
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2015 ACC/AHA/HRS SVT Guidelines
J Am Coll Cardiol. 2016;67(13):e27-e115.
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Supraventricular Tachycardia?
Inappropriate Sinus
Tachycardia
Atrial Fibrillation Typical Atrial Flutter
Atypical Atrial Flutter
Multifocal Atrial
Tachycardia
AV Nodal Reentry
(AVNRT)
Atrial Ventricular Tachycardia
(AVRT)
Atrial Tachycardia
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DefinitionSVT: An umbrella term used to describe tachycardias, the mechanism of which involves tissue from the His bundle or above
• Inappropriate sinus tachycardia
• AT (including focal and multifocal AT)
• Macroreentrant AT (including typical atrial flutter)
• Junctional tachycardia
Paroxysmal Supraventricular Tachycardia (PSVT):
A clinical syndrome characterized by the presence of a regular
and rapid tachycardia of abrupt onset and termination Junctional tachycardia
• AVNRT, and various forms of accessory pathway-mediated reentrant tachycardias
• The term does not include AF
and rapid tachycardia of abrupt onset and termination
• AVNRT (AV nodal reentrant tachycardia)
• AVRT (Atrio-ventricular reentrant tachycardia)
• Atrial tachycardia (focal/ectopic)
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Inappropriate Sinus Tachycardia
• Sinus heart rate >100 bpm at rest, with a mean 24-h heart rate >90 bpm not due to appropriate physiological responses or primary causes such as hyperthyroidism or anemia
• Beta blockers, calcium channel blockers are first line, but generally • Beta blockers, calcium channel blockers are first line, but generally poorly tolerated
• Ivabradine is an inhibitor of the “I-funny” or “If” channel, which is responsible for normal automaticity of the sinus node; therefore, ivabradine reduces the sinus node pacemaker activity
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Supraventricular Tachycardia
Inappropriate Sinus
Tachycardia
Atrial Fibrillation Typical Atrial Flutter
Atypical Atrial Flutter
Multifocal Atrial
Tachycardia
Paroxysmal
AV Nodal Reentry
(AVNRT)
Atrial Ventricular Tachycardia
(AVRT)
Atrial Tachycardia
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pSVT Mechanisms
AV Nodal Reentrant
Tachycardia (AVNRT)
”No RP”
AV Reentrant
Tachycardia (AVRT)
”Short RP”
Atrial
Tachycardia
”Long RP”
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Reentry Mechanism
AV Node
Atrium
X
Ventricle
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Question 1• 18 year old
• Prior ablation for SVT
• Presents with recurrent palpitation
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Question 1
1. Reassure patient
2. Schedule ablation
3. Request more strips
4. Prescribe anxiolytic4. Prescribe anxiolytic
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Diagnosis
• History• Abrupt onset/offset
• Triggers
• Sensation in neck
• ECG• ECG• onset and/or offset – monitoring is VITAL
• Look for the P waves
• Look for the P waves
• Look for the P waves
• Treatment• adenosine, carotid sinus massage may be required to make diagnosis
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Agenda
• Definitions/Diagnosis
• Acute Treatment
• Long-Term TherapyLong-Term Therapy
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Acute Treatment
Regular SVT
Vagal maneuvers
and/or IV adenosine
(Class I)
If ineffective or not feasible
Hemodynamically
Stable?
2015 ACC/AHA/HRS SVT Guidelines
J Am Coll Cardiol. 2016;67(13):e27-e115.
IV β-blockers,
IV diltiazem or
IV verapamil
(Class IIa)
Synchronized
Cardioversion
(Class I)
Yes
Synchronized
Cardioversion
(Class I)
No
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Adenosine
No changeAbrupt
termination
Persistent
arrhythmia
Gradual
slowing withNo change
Inadequate dose/deliveryConsider VT
termination
AVNRTAVRT
Focal AT
arrhythmia
w/AV block
Atrial flutterReentrant AT
Sinus tachycardia
Focal AT
slowing with
reacceleration
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Adenosine Terminating SVT
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Flutter or PSVT?
Sandler DA et al. J Cardiovasc Electrophysiol 2006;17:1251
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Sandler DA et al. J Cardiovasc Electrophysiol 2006;17:1251
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Question 2
35-year-old presents with palpitation
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Question 2:
Why didn’t this patient respond to adenosine?
1. Rhythm is not SVT
2. Adenosine not given fast enough
3. Not enough adenosine given
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Agenda
• Definitions/Diagnosis
• Acute Treatment
• Long-Term TherapyLong-Term Therapy
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Long-Term Therapy
• What is ablation?
• What is prognosis?
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AVNRT AblationAVNRT AblationAVNRT AblationAVNRT Ablation
Success 96-97%
Recurrence 5%
Complications
AV block 0.7% Fast AV block 0.7%
Death 0%
Tamponade 0%
Spector P et al Am J Cardiol. 2009;104:671–7.
Calkins H et al Circulation. 1999;99:262–70.
Slow
Pathway
Fast
Pathway
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AVRT AblationAVRT AblationAVRT AblationAVRT Ablation
Success 93%
Recurrence 8 %
Complications
AV Block 0.3%AV Block 0.3%
Death 0.1%
Tamponade 0.4%
Spector P et al Am J Cardiol. 2009;104:671–7.
Calkins H et al Circulation. 1999;99:262–70.
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AV Node
SVC
Young patient with recurrence after prior ablation
Pathway
TV
IVC
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Atrial Tachycardia Atrial Tachycardia Atrial Tachycardia Atrial Tachycardia AblationAblationAblationAblation
• Requires induction and mapping
May be difficult with sedation
• Success rates often lower (“80-100%”)
• Complications based on location
Less than 2%Less than 2%
2015 ACC/AHA/HRS SVT Guidelines
J Am Coll Cardiol. 2016;67(13):e27-e115.
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Kister PM J Am Coll Cardiol 2006;48:1010
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SVT Quality of Life
60%
70%
80%
90%
100%
Asymptomatic
Ablation improves
health-related quality
of life to a greater
extent, and in more
0%
10%
20%
30%
40%
50%
Baseline Medical
Therapy
Baseline Ablation
Asymptomatic
Monthly Sx
Weekly Sx
extent, and in more
aspects of general and
disease-specific health
than medication
Bathina MN et al. Am J Cardiol. 1998 Sep 1;82(5):589-93
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Health Care Utilization of Patients Presenting to the ED with PSVT
Hazard Ratios for ED Visits
BMI
Illicit Drug Use
Diabetes Mellitus
Previously on AATx
• Retrospective analysis of 100 patients presenting to an urban ED for treatment of first PSVT between February 2006 and August 2011
0.04 0.2 1 5
Previously on AATx
Fastest HR
Ablation Performed
• A visit to an electrophysiologist and ablation for SVT, are associated with markedly reduced health care utilization among patients presenting to the ED with PSVT
Oesterle AC et al Circulation. 2013;128:A11167
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SVT Prognosis
• “Benign” (extremely rare to cause death)*
• Often recurs
*Except WPW
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Question 3
28-year-old with palpitation
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Question 3
Does this patient have WPW?
1. Yes
2. No
3. Can’t tell3. Can’t tell
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WolffWolffWolffWolff----ParkinsonParkinsonParkinsonParkinson----White SyndromeWhite SyndromeWhite SyndromeWhite Syndrome
Delta Wave
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WPW Arrhythmia Mechanisms
Orthodromic Antidromic Atrial Fibrillation
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Atrial Fibrillation with Accessory Pathway: Life threatening
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Long-Term Therapy Regular SVT
Pre-excitation?
Ablation candidate,
willing to undergo
yes
Ablation
candidate,
no
2015 ACC/AHA/HRS SVT Guidelines
J Am Coll Cardiol. 2016;67(13):e27-e115.
EP Study and
catheter ablation
(Class I)
willing to undergo
ablation
candidate,
pt prefers ablation
EP Study and
catheter ablation
(Class I)
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Long-Term TherapyRegular SVT
Pre-excitation?
EP Study and
Ablation candidate,
willing to undergo
ablation
yes
Ablation
candidate,
pt prefers ablation
no
yesyes no
EP Study and
catheter ablation
(Class I)
EP Study and
catheter ablation
(Class I)
β-blockers, diltiazem or
verapamil (in the absence
of pre-excitation) (Class I)
Flecainide or
propafenone (in the
absence of SHD)
(Class IIa)
Amiodarone, dofetilide,
or sotalol
(Class IIb)
Digoxin (in the absence
of pre-excitation)
(Class IIb)
Medical Therapy*If ineffective If ineffective
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Parting Thoughts
• Symptoms of palpitation should be evaluated with a monitor
• Symptoms suspicious of pSVT include abrupt onset and offset, sensation in the neck
• True pSVT refers to: AVNRT, AVRT, atrial tachycardia• True pSVT refers to: AVNRT, AVRT, atrial tachycardia
• pSVT ablation comes with high success and low complication rates
• Decision to ablate based on severity/frequency of symptoms
• WPW may be a life-threatening condition and needs further evaluation
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Management of SVT:
Feel the BurnFeel the BurnDavid A. Sandler, MD, FACC, FHRS
Director, Heart Rhythm Service
Oklahoma Heart Institute