EKG

Electrocardiography - Indications

Dysrhythmias

Dysrhythmias refer to irregular heart rhythms that can arise from various pathologies or conditions. The following are key types of dysrhythmias relevant to electrocardiography:

  • Sinus Bradycardia

    • Definition: Sinus bradycardia occurs when the heart rate is less than 60 beats per minute, originating from the sinoatrial node.

  • Sinus Tachycardia

    • Definition: Sinus tachycardia is characterized by a heart rate exceeding 100 beats per minute, also originating from the sinoatrial node.

  • Atrioventricular (AV) Blocks

    • Definition: AV blocks are interruptions in the conduction of impulses from the atria to the ventricles. These blocks can be categorized into:
    • First-degree AV block
    • Second-degree AV block (Mobitz type I and II)
    • Third-degree AV block (complete heart block)

  • Atrial Fibrillation

    • Definition: Atrial fibrillation is a common type of supraventricular tachycardia characterized by rapid and irregular beating of the atria.

  • Premature Atrial Complexes (PACs)

    • Definition: PACs are early heartbeats originating in the atria, which can disrupt the normal rhythm.

  • Premature Ventricular Complexes (PVCs)

    • Definition: PVCs are early heartbeats originating in the ventricles and can lead to an irregular heartbeat pattern.

  • Supraventricular Tachycardia (SVT)

    • Definition: SVT encompasses various tachycardias that arise above the ventricles, often leading to rapid heart rates.

  • Ventricular Tachycardia (VT)

    • Definition: VT is characterized by a fast heart rate originating from the ventricles, which can be life-threatening if sustained.

  • Ventricular Fibrillation (VF)

    • Definition: VF is a critical condition where the ventricles quiver instead of contracting properly, leading to the cessation of effective blood circulation.

Client Presentation

The following conditions may necessitate the use of electrocardiography based on client presentation:

  • Cardiovascular Disease

    • Description: This encompasses a wide range of heart-related disorders, including coronary artery disease, heart failure, and valvular heart disease.

  • Myocardial Infarction (MI)

    • Definition: MI, commonly known as a heart attack, occurs when blood flow to a part of the heart is blocked, resulting in tissue damage.

  • Hypoxia

    • Description: Hypoxia refers to a deficiency in the amount of oxygen reaching the tissues, which can affect heart function.

  • Acid-Base Imbalances

    • Description: Imbalances in body acidity and alkalinity, which can affect cardiac rhythm and function.

  • Electrolyte Disturbances

    • Description: Alterations in electrolyte levels, such as potassium or calcium shifts, which can lead to dysrhythmias.

  • Pericarditis

    • Definition: Pericarditis is the inflammation of the pericardium, which can lead to complications affecting heart function.

  • Drug or Alcohol Use

    • Description: Substance abuse can lead to significant cardiovascular side effects, prompting the need for ECG monitoring.

  • Shock

    • Definition: Shock is a critical condition resulting from insufficient blood flow to tissues, impacting cardiac function and health.