CADIOLOGY NURSING

• Deoxygenated blood enters the right atrium from the superior vena cava and inferior vena cava.
• Deoxegenated blood will flow to the righ atrium through the tricuspid valve going to right ventricle and will pump into pulmunary valve to pulmonic arteries going out to lungs.
• (Lungs)Oxygenated blood returns to left atrium via pulmonary veins, then flows to left ventricle through bicuspid valve, pumps oxygenated blood to aorta, and goes out to body organs.
• Supraventricular tachycardia(SVT)

  • Profound rapid atrial rhythm with narrow QRS complex.
  • HR:150 to 250 BPM
• Atrial Fibrillation(aFib)

  • Uniquely characterized by an absent of P waves before the QRS complex
  • HR:highly irregular with significant flactuation
• Atrial Flutter

  • Uniquely characterized by saw toothed flutter appearance.
  • Toothed fluttering represents multiple P-wave for a single QRS complex.
• Ventricular Tachycardia(vtach)

  • Abnormally patterned wide QRS complex
  • No P wave
  • HR:>100 BPM
  • Defibrillation
• Pulseless ventricular Fibrillation(vfib)

  • Chaotic and disorganized wave pattern
  • No palpable pulse
• 1st degree heart block

  • Prolonged PR interval due to delay in AV signal transmission
• 2nd degree AV block type I (mobitz typeI, wenckebachs)

  • Progressive lengthening of the PR interval .
  • Progression occurs until the QRS complex is dropped.
• 2nd degree AV block type2 (mobitz type 2)

  • PR interval is >0.20 seconds and consistent but drops a beat generally on a pattern of 3:1 or 4:1.
• 3rd degree AV block (complete heart block)

  • No identifiable relationship between the Pwave and QRS waves.
  • P wave intervals are normal but do not relate to the QRS complex.