The pressure changes in the four chambers on the heart (two atria’s and two ventricles) allow the blood to continuously flow in one direction. This is also aided by the valves (artioventricular and semi lunar valves). The circulatory system consists of the heart as well. The heart is a complex
QRS complex indicates ventricular depolarization.ST segment shows the time between ventricular depolarization and the starting of repolarisation. And the T wave shows the ventricular repolarisation. For detecting the heart rate QRS complex detection is necessary. Among all the waves in the signal the QRS complex has higher
Perfusion : Perfusion is the process of a body delivering blood to a capillary bed in itsbiological tissue. The word is derived from the French verb "perfuser" meaning to "pour over or through". Tests verifying that adequate perfusion exists are a part of a patient's assessment process that are performed by medical or emergency personnel. The most common methods include evaluating a body's skin color, temperature, condition and capillary refill. Perfusionists employ artificial blood pumps to propel open-heart surgery patients' blood through their body tissue, replacing the function of the heart while the cardiac surgeon operates.
The portal venous pressure is around 3-7 mmHg which is dependent on various criteria like “posture, increased intra-abdominal pressure like in coughing, compression , respiration, Valsalva’s manoeuvre and a number of biochemical mediators”1. Whereas the blood flow in the portal system is around 1000–1200ml/min and it contributes to around 72% of total supply of oxygen to the liver. The content of oxygen in the portal venous system is lower than the arterial blood, but it is at the same time significantly higher compared to that of the rest of venous system. There is never a consistent pattern of the hepatic distribution of portal blood. PORTAL HYPERTENSION - DEFINITION An elevated pressure of more than 12 mmHg in the portal venous circulation with the portal vein diameter of more than 13 mm or an increased gradient of more than 7mmHg in the portal system (difference between pressure in the portal vein and to that of the pressure in the inferior vena cava) is termed as portal hypertension(PHT).
• CAP has been shown to more strongly relate to vascular disease and outcome than traditional upper arm blood pressure. Cap is the pressure that the heart has to pump against to get blood to flow to the rest of the body. Higher central blood pressures mean that the heart must work harder to do its job. This can eventually lead to heart failure. • Aortic BP also determines the pressure in the blood vessels feeding the
Coronary heart diseases are caused by fatty material, such as saturated fat and trans-fat. The fatty material is made the vessel lumen became narrow. The blood pressure of coronary vessel increased (David et. al., 2012). The aging of blood vessel is loss the elastic and became hard and thick.
In order for the blood to push the ball to allow blood flow, the heart has to apply greater pressure than in the normal conditions. There will be damage to the blood corpuscles which might even cause their death upon collision. Figure: Caged-ball valve.  Figure: (a) Hufnagel–Lucite valve, (b) Starr–Edwards, (c) Smeloff–Cutter, (d) McGovern–Cronie, (e) DeBakey–Surgitool and (f)
• Systole is when the cardiac muscle contracts to push out the blood from the chamber they are in it. During ventricular systole the blood pressure increases in arteries. • Diastole is when the cardiac muscle is relaxed allowing allow the chamber to fill with blood. During ventricular diastole the blood pressure decreases in arteries. This leads to conclude that the higher blood pressure is the systolic pressure (for example 120 mmHg), and the lower blood pressure is the diastolic pressure (for example 80 mmHg).