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Heart Blocks as Relationships
1st degree AV block - Not as close as they used to be...
2nd
Heart Blocks as ... Relationships 1st ... degree AV block ... rob_buttner #Heart #Blocks
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
Atrioventricular Blocks ... (AV blocks) - ECG ... P wave has no relationship ... really no P and QRS relationship ... a predictable relationship
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
Summary of Heart Blocks ... 1st Degree Heart Block ... Mobitz I Heart Block ... pattern or fixed relationship ... • Block in AV
Paroxysmal AV Block on ECG
 - Characterized by an abrupt and persistent AV block in the
Paroxysmal AV Block ... persistent AV block ... : conducted or blocked ... initiated, the block ... a predictable relationship
Paroxysmal AV Block aka Ventricular Standstill
 • Abrupt and persistent AV block ( multiple P waves
Paroxysmal AV Block ... persistent AV block ... • Once the block ... initiated, the block ... a predictable relationship
Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
Third Degree AV Block ... Complete Heart Block ... with complete AV block ... P wave has no relationship ... really no P and QRS relationship
Another way to illustrate this is simply to list the factors which affect cvO2% (table below;
(table below; Bloos ... that no simple relationship
Sedative-Hypnotic Drugs
Benzodiazepines:
 - Bind to specific GABAA receptor subunits at central nervous system (CNS) neuronal synapses
dose-response relationship ... Antagonists: - Blocks
Pharmaceutical Management of Hyperthyroidism / Thyroid Storm
Beta-Blockers 
• Decreases sympathetic hyperactivity 
• Partially blocks peripheral conversion
Thyroid Storm Beta-Blockers ... • Partially blocks ... Propylthiouracil (PTU) • Blocks ... Methimazole • Blocks ... pathway has been blocked
Ultrasound-Guided Regional Nerve Blocks in Emergency Medicine: Superficial Cervical Plexus Nerve Block
Uses in the Emergency Department:
Regional Nerve Blocks ... Cervical Plexus Nerve Block ... plexus #nerve #block