Facts about Heart:-

                                        Blood Pressure:-

• The pressure created by the blood on the walls of the blood vessels due to the repeated pumping of heart is called blood pressure.
• It can be felt an certain places in our body viz., Wrist of the hands, etc. 
• The rate of pulsation increases during excitement.
• Blood pressure is recorded as systolic/diastolic.
• Blood pressure is normal person =120/80 mm Hg.
• Factors affecting blood pressure are age, cardiac output, total peripheral resistance, etc.

                                            Heart Beat:-

• It is the rhythmic contraction and expansion movement of heart.
• The movements of heart beat are similar to the contraction and dilation of ventricles.
• The rate of heart beat is 72 per min in adult male and little higher in woman,children, infants, during exercise, fever and excitement.
• A Heart beat has two compounds, Systole and diastole.
• These components produce sounds like lub and dub.
• Stethoscope is used to  listen heart on the left side of the chest.

                                         Heart Sounds:-     

• The beating of heart produces sounds, heard by stethoscope.
• There are four heart sounds designated as S1, S2, S3,and S4.

First Sounds:-

• is a long and louder sound created by the closure of atrioventricular valves at the beginning of ventricular systole.

Second Sounds:-

• Is a short and sharper sound created by the closure semilunar valves towards the end of ventricular systole.
• The s3 and s4 may not be audible but are usually faint.
• These sounds are associated with the rapid venticular filling and systole.