Dr. Tiffany N. Lee, BS, DC, FASA

Seminar Outline Structure of the Heart Blood Flow Through the Heart Coronary circulation Conduction System of the Heart Blood vessels Hepatic Portal Circulation Fetal Circulation Blood Pressure

Structure of the Heart Heart Chambers Atria Receiving chambers Ventricles Discharging chambers

Structure of the Heart Heart Valves Atrioventricular valves Tricuspid valve Bicuspid Valve Semilunar valves Pulmonary valve Aortic Valve

Structure of the Heart Heart Coverings Pericardium Parietal pericardium Visceral Pericardium, also known as the Epicardium

Blood Flow Through the Heart Right Atrium Right Ventricle Lungs Left Atrium Left Ventricle Body

Coronary Circulation Coronary Arteries Coronary Veins Coronary Sinus

Case Study You hear that a friend has blocked coronary arteries. What are the possible causes? What could result if the condition is not treated? How can a coronary blockage be treated?

Conduction System of the Heart SA (sinoatrial) node Also called the pacemaker AV (atrioventricular) node AV bundle (bundle of His) Purkinje fibers P-wave Depolarization of atria QRS complex Depolarization of ventricles T-wave Repolarization of ventricles

Blood Vessels Major arteries Aorta, carotid, etc. Arterioles Capillaries Venules Major veins Superior and Inferior vena cavae

Hepatic Portal Circulation Many abdominal organs participate in this circulation This circulation is important for: Excess glucose storage Removal of toxins from blood

Fetal Circulation Placenta Umbilical Vein Ductus Venosus Fetal Heart Foramen Ovale Ductus Arteriosus Umbilical Arteries

Factor Influencing Blood Pressure Blood volume Strength of heart contractions Heart rate Blood viscosity Resistance to blood flow

Case Study Suppose an individual was injured in an automobile accident and his right arm was seriously damaged with copious blood loss. His blood pressure steadily dropped to dangerous levels. Explain how the loss of blood will reduce the blood pressure reading.