1 / 11

Physiology of the Heart

Physiology of the Heart. Part 2: p. 357-360. The Cardiac Cycle. Cardiac cycle activity – what do you know?. Pressure (inside the heart). Ventricular Volume. EKG. Heart Sounds. Animation 1 Animation 2. Cardiac Output. CO = HR x SV Ave CO = 75 bpm x 70 ml/beat = 5250 ml/min

ivana-hebert
Télécharger la présentation

Physiology of the Heart

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Physiology of the Heart Part 2: p. 357-360

  2. The Cardiac Cycle Cardiac cycle activity – what do you know?

  3. Pressure (inside the heart)

  4. Ventricular Volume

  5. EKG

  6. Heart Sounds Animation 1 Animation 2

  7. Cardiac Output • CO = HR x SV • Ave CO = 75 bpm x 70 ml/beat = 5250 ml/min • Regulation of SV (~60% of ventricular vol) • Stretch of cardiac muscle cells • Venous return (hemorrhage, exercise) • Muscular pump • Respiratory pump

  8. Cardiac Output • CO = HR x SV • Regulation of HR • Compensation for low SV • Loss of blood • Weakened cardiac muscle • Stress (fight or flight response) • Nerves – slow/steady HR or increase HR • Hormones: epinephrine, thyroxine – increase HR • Electrolyte imbalances (Ca+2, K+, Na+) • Physical factors: age, gender, exercise, body temperature

  9. Heart Conditions • Congestive heart failure • Fails on left: pulmonary congestion … edema • Fails on right: peripheral congestion … edema

More Related