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Dysrhythmias V: Evaluating Dysrhythmias01:30

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
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An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
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Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
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Mania, a psychological condition characterized by elevated mood, increased energy, and reduced sleep need, is part of the bipolar disorder cycle. The exact cause of mania isn't entirely known, but it is thought to be a combination of genetic, environmental, and neurological factors. Bipolar disorder involves alternating manic and depressive episodes. Mood stabilizers like lithium, antipsychotics, and anticonvulsants help manage these episodes. Lithium carbonate is particularly effective as...
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Lithium-induced electrocardiographic changes: A complete review.

Nikhil Mehta1, Robert Vannozzi2

  • 1Department of Internal Medicine, Rochester Regional Health, Rochester, New York.

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Summary
This summary is machine-generated.

Lithium treatment for bipolar disorder can cause cardiac side effects, including ECG changes and arrhythmias. Regular electrocardiogram (ECG) monitoring is crucial for safe lithium use.

Keywords:
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Area of Science:

  • Cardiology
  • Psychiatry
  • Pharmacology

Background:

  • Lithium is a long-standing treatment for bipolar disorder.
  • Cardiac side effects, ranging from benign electrocardiographic (ECG) changes to life-threatening arrhythmias, are associated with lithium therapy.

Purpose of the Study:

  • To systematically review the literature on lithium-associated electrocardiographic (ECG) findings.
  • To identify the spectrum of cardiac electrical changes induced by lithium therapy.

Main Methods:

  • A systematic literature search was performed on PubMed and Medline (January 1970 - March 2016).
  • Keywords used were "lithium" and "electrocardiography" or "ECG."
  • Article screening by title was conducted by two authors and a librarian.

Main Results:

  • 56 out of 406 articles met the screening criteria.
  • T wave inversion was the most common ECG finding.
  • Other reported findings include sinus node dysfunction, sinoatrial blocks, PR prolongation, QT prolongation/dispersion, ventricular tachyarrhythmias, ST elevation myocardial infarction, heart blocks, and Brugada pattern.

Conclusions:

  • Lithium-induced electrical changes are dependent on treatment duration and serum lithium levels.
  • Frequent ECG monitoring is recommended for patients on lithium therapy.
  • Standardized ECG guidelines for lithium therapy are lacking but monitoring ensures safe use.