Flashcards in Meds and metabolic derangements (EKG effects) Deck (12)
digitalis/digoxin in therapeutic doses cause what on EKG?
causes scooped ST depression in therapeutic doses
Sxs of digoxin toxicity?
- GI: N/V, anorexia, diarrhea
- visual: blurred vision, yellow/green discoloration, haloes
- CVS: palpitations, syncope, dyspnea
- CNS: confusion, dizziness, fatigue
What kind of arryhthmias does digitalis toxicity cause?
- increased automaticity (increased intracellular ca), and decreased AV conduction (increased vagal effects at the AV node)
- Classic dysrythmia assoc with digoxin toxicity is combo of SVT (due to increased automaticity) with slow ventricular response (due to decreased AV conduction) - atrial tachy with block
What will you see on EKG of digoxin overload, toxicity?
- atrial and junctional premature beats
- PAT with block
- sinus blocks
- AV blocks
- atrial and junctional tachyarrhythmias
What changes will you see on EKG of hyperkalemia?
- classic change: peaked T waves
- P wave can flatten and widen
- QRS complex can widen (ventricles are taking over)
Hypokalemia on EKG?
- classic: U waves
- T waves can flatten out and possible invert
- causes irritation of ventricular foci which can lead to torsades, VT and VF
EKG findings of hypercalcemia?
- short QT interval
- j waves
EKG findings of hypocalcemia?
- prolonged QT waves
EKG findings of hypomagnesemia?
- prolonged QT
- frequent PVCs, PACs
- ventricular and supraventricular tachyarrhythmias
Hypothermia on EKG?
- osborn wave ( J wave) positive deflection at J pt (neg in AVR and VI)
- usually most prominent in precordial leads
- hypothermia: less than 30 celsius
- likely to see bradycardia
Other casuses of J waves on EKG?
- neuro insults: intracranial HTN, severe head injury, and subarachnoid hemorrhage
- idiopathic VF