110 Aortic pressure Left atrial pressure End-diastolic ECG Heart sounds Diastole Systo Diastole 4 Phase of cardac cycle 1= Ventricular filling 2= Isovolumetric ventricular contraction 3 Ventricular ejection
Copynight o The McGraw-Hill Companies. Inc Permission required for reproduction or display 1= Ventricular filling 2=Isovolumetric ventricular contraction 3= Ventricular ejection 4= Isovolumetric ventricular relaxation 3 00 工 Pulmonary artery pressure Right ventricular pressure Ti Ime Pressure changes in the right heart during a contraction cycle
Pressure changes in the right heart during a contraction cycle
Role of atria and ventricles during each cardiac cycle ° Atria-primer pump(初级泵) Ventricles-major source of power
• Atria──primer pump（初级泵） • Ventricles──major source of power Role of atria and ventricles during each cardiac cycle
Heart Sounds 心音 1st sound soft low-pitched lub associated with closure of the av valves Marks the onset of systole 2nd sound louder dup associated with closure of the pa and aortic valves Occurs at the onset of diastole
Heart Sounds 心音 • 1 st sound – soft low-pitched lub – associated with closure of the AV valves – Marks the onset of systole • 2 nd sound – louder dup – associated with closure of the PA and aortic valves – Occurs at the onset of diastole
Chest surface areas for auscultation of normal heart sounds Aortic Pulmonary LLSB Mitral Four traditional value areas Aortic space: 2RIS RIS--right intercostal space Pulmonic valve: 2LIS LIS-left intercostal space Tricuspid valve: 4ICS LLSB IC S-intercostal space Mitral valve: Apex LLSB-left lower sternal border
Chest surface areas for auscultation of normal heart sounds Four traditional value areas – Aortic space: 2RIS – Pulmonic valve: 2LIS – Tricuspid valve: 4ICS LLSB – Mitral valve: Apex RIS--right intercostal space LIS—left intercostal space ICS--intercostal space LLSB--left lower sternal border