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	<id>https://www.crsguidelines.org/index.php?action=history&amp;feed=atom&amp;title=2-4_UNSTABLE_TACHYCARDIA</id>
	<title>2-4 UNSTABLE TACHYCARDIA - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://www.crsguidelines.org/index.php?action=history&amp;feed=atom&amp;title=2-4_UNSTABLE_TACHYCARDIA"/>
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	<updated>2026-04-20T15:28:52Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.crsguidelines.org/index.php?title=2-4_UNSTABLE_TACHYCARDIA&amp;diff=41&amp;oldid=prev</id>
		<title>Cgabryszek: Created page with &quot;Symptomatic dysrhythmia may be indicated by:  acute altered mental status, ongoing severe ischemic chest pain, congestive heart failure, hypotension, or other signs of shock that persist despite adequate airway and breathing.  &#039;&#039;&#039;Any patient requiring ACLS care should have an ALS intercept if logistically possible.&#039;&#039;&#039;  {| class=&quot;wikitable&quot; |&#039;&#039;&#039;EMR - Emergency Medical Responder&#039;&#039;&#039; |}  # Begin initial medical care # Administer oxygen  # Assist ventilations if RR &lt; 8 or &gt;...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.crsguidelines.org/index.php?title=2-4_UNSTABLE_TACHYCARDIA&amp;diff=41&amp;oldid=prev"/>
		<updated>2022-04-03T21:42:57Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;Symptomatic dysrhythmia may be indicated by:  acute altered mental status, ongoing severe ischemic chest pain, congestive heart failure, hypotension, or other signs of shock that persist despite adequate airway and breathing.  &amp;#039;&amp;#039;&amp;#039;Any patient requiring ACLS care should have an ALS intercept if logistically possible.&amp;#039;&amp;#039;&amp;#039;  {| class=&amp;quot;wikitable&amp;quot; |&amp;#039;&amp;#039;&amp;#039;EMR - Emergency Medical Responder&amp;#039;&amp;#039;&amp;#039; |}  # Begin initial medical care # Administer oxygen  # Assist ventilations if RR &amp;lt; 8 or &amp;gt;...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Symptomatic dysrhythmia may be indicated by:  acute altered mental status, ongoing severe ischemic chest pain, congestive heart failure, hypotension, or other signs of shock that persist despite adequate airway and breathing.  &amp;#039;&amp;#039;&amp;#039;Any patient requiring ACLS care should have an ALS intercept if logistically possible.&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|&amp;#039;&amp;#039;&amp;#039;EMR - Emergency Medical Responder&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
# Begin initial medical care&lt;br /&gt;
# Administer oxygen &lt;br /&gt;
# Assist ventilations if RR &amp;lt; 8 or &amp;gt; 35&lt;br /&gt;
# Assess for hypotension/ shock (HR &amp;gt;130, cap refill &amp;gt; 2 seconds) &amp;amp; follow shock protocol&lt;br /&gt;
# Call for ALS intercept&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|&amp;#039;&amp;#039;&amp;#039;EMT- Emergency Medical Technician&amp;#039;&amp;#039;&amp;#039;  &amp;#039;&amp;#039;Perform/Confirm All Above Interventions&amp;#039;&amp;#039;&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
# Assure ALS intercept is en route&lt;br /&gt;
# Transport as early as possible&lt;br /&gt;
# Reassess VS often during transport&lt;br /&gt;
# Apply ECG monitor &amp;amp; run strip (if trained, if time allows and after all other interventions are completed)&lt;br /&gt;
# Perform 12-lead ECG (if trained) as indicated&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;CONTACT MEDICAL CONTROL&amp;#039;&amp;#039;&amp;#039; &lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|&amp;#039;&amp;#039;&amp;#039;AEMT – Advanced Emergency Medicine Tech  &amp;#039;&amp;#039;&amp;#039; &amp;#039;&amp;#039;Perform/Confirm All Above Interventions&amp;#039;&amp;#039;&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
# Start IV access en route, &amp;#039;&amp;#039;&amp;#039;NS TKO&amp;#039;&amp;#039;&amp;#039; (do not delay transport)&lt;br /&gt;
# Administer &amp;#039;&amp;#039;&amp;#039;NS fluid bolus&amp;#039;&amp;#039;&amp;#039;, as directed&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;CONTACT MEDICAL CONTROL&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|&amp;#039;&amp;#039;&amp;#039;Intermediate  &amp;#039;&amp;#039;&amp;#039; &amp;#039;&amp;#039;Perform/Confirm All Above Interventions&amp;#039;&amp;#039;&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
# Attach cardiac monitor if not already done, confirm rhythm via 12 lead ECG&lt;br /&gt;
# Observation and transport for &amp;#039;&amp;#039;&amp;#039;asymptomatic&amp;#039;&amp;#039;&amp;#039; tachycardia&lt;br /&gt;
# Reassess VS and rhythm frequently.&lt;br /&gt;
# For symptomatic &amp;#039;&amp;#039;&amp;#039;Sinus Tachycardia&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
## Assess for sepsis, hypovolemia, hypoxia, pain, drug ingestion, pneumothorax, cardiac tamponade, pulmonary embolism&lt;br /&gt;
## Give &amp;#039;&amp;#039;&amp;#039;NS&amp;#039;&amp;#039;&amp;#039; &amp;#039;&amp;#039;&amp;#039;fluid bolus 500 mL&amp;#039;&amp;#039;&amp;#039; if lungs are clear and indicated&lt;br /&gt;
# For symptomatic &amp;#039;&amp;#039;&amp;#039;Wide Complex Tachycardia&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
## &amp;#039;&amp;#039;&amp;#039;Synchronized cardioversion&amp;#039;&amp;#039;&amp;#039; at 100 J&lt;br /&gt;
## If unsuccessful, reset sync and give max J (or biphasic equivalents) between each attempt&lt;br /&gt;
## Use defibrillation if there is a significant delay in synchronization or deterioration of condition&lt;br /&gt;
### If unsuccessful consider repositioning of the defib pads&lt;br /&gt;
## May repeat total of 3 attempts and if still unsuccessful:&lt;br /&gt;
### &amp;#039;&amp;#039;&amp;#039;CONTACT MEDICAL CONTROL&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
### Consider hyperkalemia as a cause, and the possible need for &amp;#039;&amp;#039;&amp;#039;Calcium Chloride&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
### Consider administration of &amp;#039;&amp;#039;&amp;#039;amiodarone (Cordarone)&amp;#039;&amp;#039;&amp;#039; 150 mg slow IV over 10 min; May repeat (evaluate rhythm very closely, amiodarone may be contraindicated for torsades de point)&lt;br /&gt;
## If pulseless at any time, reassess rhythm and go to appropriate algorithm.&lt;br /&gt;
# For &amp;#039;&amp;#039;&amp;#039;Narrow Complex Tachycardia (SVT)&amp;#039;&amp;#039;&amp;#039; HR&amp;gt;150&lt;br /&gt;
## If patient unstable, HR &amp;gt; 150 and instability is due to the tachycardia, consider immediate synchronized cardioversion&lt;br /&gt;
### Synchronized cardioversion at 100 J;&lt;br /&gt;
## If HR&amp;gt;150 and patient condition allows; Give &amp;#039;&amp;#039;&amp;#039;adenosine (Adenocard)&amp;#039;&amp;#039;&amp;#039; rapid IV push followed by rapid saline flush, as near to IV site as possible&lt;br /&gt;
### Give &amp;#039;&amp;#039;&amp;#039;6 mg&amp;#039;&amp;#039;&amp;#039; adenosine (Adenocard) &amp;amp; assess underlying rhythm; Transport without more adenosine if underlying rhythm is junctional, ectopic, or multifocal atrial tachycardia.&lt;br /&gt;
### Give &amp;#039;&amp;#039;&amp;#039;12 mg&amp;#039;&amp;#039;&amp;#039; adenosine (Adenocard) if refractory SVT; may repeat &amp;#039;&amp;#039;&amp;#039;12 mg&amp;#039;&amp;#039;&amp;#039; if still refractory SVT&lt;br /&gt;
### Expedite transport if adenosine is unsuccessful&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;CONTACT MEDICAL CONTROL&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|&amp;#039;&amp;#039;&amp;#039;Paramedic  &amp;#039;&amp;#039;&amp;#039; &amp;#039;&amp;#039;Perform/Confirm All Above Interventions&amp;#039;&amp;#039;&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
# Attach cardiac monitor if not already done, confirm rhythm via 12 lead ECG&lt;br /&gt;
# Observation and transport for &amp;#039;&amp;#039;&amp;#039;asymptomatic&amp;#039;&amp;#039;&amp;#039; tachycardia&lt;br /&gt;
# Reassess VS and rhythm frequently.&lt;br /&gt;
# For symptomatic &amp;#039;&amp;#039;&amp;#039;Sinus Tachycardia&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
## Assess for sepsis, hypovolemia, hypoxia, pain, drug ingestion, pneumothorax, cardiac tamponade, pulmonary embolism&lt;br /&gt;
## Give &amp;#039;&amp;#039;&amp;#039;NS&amp;#039;&amp;#039;&amp;#039; &amp;#039;&amp;#039;&amp;#039;fluid bolus 500 mL&amp;#039;&amp;#039;&amp;#039; if lungs are clear and indicated&lt;br /&gt;
# For symptomatic &amp;#039;&amp;#039;&amp;#039;Wide Complex Tachycardia&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
## Sedate with &amp;#039;&amp;#039;&amp;#039;midazolam (Versed&amp;#039;&amp;#039;&amp;#039;) 2 mg slowly IV/IO if indicated; May repeat to max dose of 4 mg&lt;br /&gt;
## &amp;#039;&amp;#039;&amp;#039;Synchronized cardioversion&amp;#039;&amp;#039;&amp;#039; at 100 J&lt;br /&gt;
## If unsuccessful, reset synchronization and give max J (or biphasic equivalents) between each attempt&lt;br /&gt;
## Use defibrillation if there is a significant delay in synchronization or deterioration of condition&lt;br /&gt;
### If unsuccessful consider repositioning of the defib pads&lt;br /&gt;
## May repeat total of 3 attempts and if still unsuccessful:&lt;br /&gt;
### &amp;#039;&amp;#039;&amp;#039;CONTACT MEDICAL CONTROL&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
### Consider hyperkalemia as a cause, and the possible need for &amp;#039;&amp;#039;&amp;#039;Calcium Chloride&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
### Consider administration of &amp;#039;&amp;#039;&amp;#039;amiodarone (Cordarone)&amp;#039;&amp;#039;&amp;#039; 150 mg slow IV/IO over 10 min; May repeat (evaluate rhythm very closely, amiodarone may be contraindicated for torsades de point)&lt;br /&gt;
### If pulseless at any time, reassess rhythm and go to appropriate algorithm.&lt;br /&gt;
# For &amp;#039;&amp;#039;&amp;#039;Narrow Complex Tachycardia (SVT)&amp;#039;&amp;#039;&amp;#039; HR&amp;gt;150&lt;br /&gt;
## If patient unstable, HR &amp;gt; 150 and instability is due to the tachycardia, consider immediate synchronized cardioversion&lt;br /&gt;
### Sedate with &amp;#039;&amp;#039;&amp;#039;midazalom (Versed)&amp;#039;&amp;#039;&amp;#039; 2 mg slowly IV/IO if indicated; May repeat to max dose of 4 mg&lt;br /&gt;
### Synchronized cardioversion at 100 J;&lt;br /&gt;
## If HR&amp;gt;150 and patient condition allows; Give &amp;#039;&amp;#039;&amp;#039;adenosine (Adenocard)&amp;#039;&amp;#039;&amp;#039; rapid IV/IO push followed by rapid saline flush, as near to IV site as possible&lt;br /&gt;
### Give &amp;#039;&amp;#039;&amp;#039;6 mg&amp;#039;&amp;#039;&amp;#039; adenosine (Adenocard) &amp;amp; assess underlying rhythm; Transport without more adenosine if underlying rhythm is junctional, ectopic, or multifocal atrial tachycardia.&lt;br /&gt;
### Give &amp;#039;&amp;#039;&amp;#039;12 mg&amp;#039;&amp;#039;&amp;#039; adenosine (Adenocard) if refractory SVT; may repeat &amp;#039;&amp;#039;&amp;#039;12 mg&amp;#039;&amp;#039;&amp;#039; if still refractory SVT&lt;br /&gt;
### Expedite transport if adenosine is unsuccessful&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;CONTACT MEDICAL CONTROL&amp;#039;&amp;#039;&amp;#039;&lt;/div&gt;</summary>
		<author><name>Cgabryszek</name></author>
	</entry>
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