Basic Arrhythmia: Introduction

Interpretation: Normal Sinus Rhythm with Bundle Branch Block (aka IVCD)

Normal Sinus Rhythm with Bundle Branch Block (aka IVCD)

The only abnormality identified as compared to expected NSR is the abnormally wide QRS complex.

Clinical Implications

Bundle branch blocks may occur in people with healthy hearts. It is, however, abnormal under the following conditions:

  • noncardiac: pulmonary embolism
  • cardiac diseases: myocardial ischemia, myocardial infarction, congestive heart failure, pericarditis, myocarditis, hypertensive heart disease, cardiac tumors, cardiomyopathy, congenital heart disease, rheumatic heart disease, degenerative heart disease, valvular stenosis

Individuals may be asymptomatic. When symptoms are present, they are generally related to those of an acute myocardial infarction: hypotension, palpitations, shortness of breath, light-headedness, syncope, dizziness, and/or chest pain.

When asymptomatic, treatment may not be necessary except observation. For those with symptoms, identify and treat the cause. Treatment may include:

  • oxygen
  • treatment given for myocardial infarction: MONA (see ACLS guidelines)

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Basic Arrhythmia : Ventricular Rhythms

Basic Arrhythmia