A 75-year-old man is brought to the emergency department after a syncopal episode at home. On arrival, he is lethargic and complains of lightheadedness and mild chest heaviness. His blood pressure is 82/50 mm Hg, and his pulse is 32/min. An electrocardiogram reveals sinus bradycardia with no evidence of acute ischemia. The patient is immediately placed on a continuous cardiac monitor and receives supplemental oxygen. Arrange the following interventions in the correct sequential order for the stepwise management of this hemodynamically unstable patient, from immediate acute stabilization to definitive long-term therapy.
- 1Administration of intravenous atropine
- 2Initiation of transcutaneous pacing
- 3Insertion of a temporary transvenous pacemaker
- 4Implantation of a permanent pacemaker
Cevap
The correct sequence is: Administration of intravenous atropine, followed by initiation of transcutaneous pacing, insertion of a temporary transvenous pacemaker, and finally implantation of a permanent pacemaker.
The patient is experiencing hemodynamically unstable symptomatic bradycardia (hypotension, altered mental status). The standard life support algorithm dictates a stepwise escalation of care. Intravenous atropine is the most rapid first-line intervention available at the bedside. If the patient does not respond adequately to atropine, non-invasive transcutaneous pacing is immediately initiated as an emergency bridge. Because transcutaneous pacing causes painful skeletal muscle contractions and can lose capture, a temporary transvenous pacemaker is subsequently floated into the right ventricle for intermediate stabilization. Finally, after the acute crisis is managed and if the bradycardia is deemed irreversible, a permanent pacemaker is surgically implanted for definitive therapy.
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Anahtar Kavram
The management of hemodynamically unstable bradycardia follows a strict stepwise escalation: initial rapid pharmacologic stabilization (atropine), non-invasive mechanical support (transcutaneous pacing), invasive temporary stabilization (transvenous pacing), and ultimately definitive surgical therapy (permanent pacemaker).