ipl-logo

Cardiac Muscle Case Study

703 Words3 Pages

Section A – Part II
Cardiac cycle or heartbeat
Blood enters and fills both atriums at the same time. When full the pressure causes the tricuspid and bicuspid valves to open and flows into the ventricles. Contraction (systole) of each atrium now forces any remaining blood into the ventricles. The ventricles now contract (systole) and atriums relax (diastole). The pressure closes the tricuspid and bicuspid valves (causes the first sound of the heart beat). The contraction of the ventricles opens the semi lunar valves, forcing blood into the pulmonary and aorta arteries. The ventricles now relax (diastole) and any backflow of blood causes the semilunar valves to close (causing the second sound of the heart beat). Cardiac muscle never tires. The heart has its own …show more content…

Without pressure blood would not move at all. Blood is always under pressure, but the amount of pressure varies in different blood vessels.
Blood is forced into the arteries under high pressure from the left ventricle, the region of highest pressure, it eventually re-enters the heart via the venae-cavaes into the right atrium the region of lowest pressure.

Normal adult blood pressure is 120/80 mmGH which is dependent on age. The top number is systole and the bottom is diastole. Diastole is the reading when the heart is relaxed and systole is when the ventricles of the heart contract (the working phase of the heart)
Hypertension (high blood pressure) is blood pressure that consistently remains above the normal level of 120/80. Things such as stress, kidney disease, smoking, too much alcohol and bad diet can cause high blood pressure
Hypotension (Low blood pressure) is when the blood pressure constantly remains below the normal level of 120/80. Things such as shock, haemorrhage, burns, some types of medication, dehydration, anaemia and allergic reactions can cause low blood

Show More
Related
1789 Words | 8 Pages

The cardiac cycle is the coordination of the filling and exhausting of blood by electrical signals that cause the heart muscles to contract and unwind. The contraction of the heart is directed by a nerve drive that goes from the SA node to AV node to AV group to Purkinje fibers to the myocardium. Amid the cardiac cycle, the heart contracts by means of systole, pushing blood out of the heart, and unwinds through diastole, filling the heart with blood. Cardiomyocytes, or cardiac cells, are striated and are in charge of the pumping of the heart; they are the main muscle cells with intercalated plates. The heart's inner pacemaker controls and times the thumping of the heart by means of electrical signals.

Read More
951 Words | 4 Pages

Cardiac murmurs can be present at birth (congenital; often caused by malformations) or acquired and manifests later in the animals life. (Ex: disease of the cardiac muscles, disease of the cardiac valves, etc.). It is important to note that many animals with heart murmurs can live a long and happy life without

Read More
576 Words | 3 Pages

Hypovolemic shock is the body’s response to a significant loss of fluids that disrupts the volume of blood within the body the body, causing disturbance in normally functioning systems. The most common cause of such response is from rapid loss of fluids, such as with hemorrhage, a sudden acute blood loss that can be externally or internally found throughout the human body (Tortura 781). Hypovolemic shock will then come secondary to hemorrhagic shock, the body’s initial response rapid blood loss as a way of trying to slow down or stop bleeding. When blood loss cannot be controlled with hemorrhagic shock, hypovolemic shock is then initiated (Kolecki, “Background”). However, significant fluid loss can also cause in relation to hypovolemic shock can occur in other ways, such as with excessive sweating, diarrhea, vomiting, or from a lack of fluid intake (Tortura 781).

Read More
810 Words | 4 Pages

Thus, the pericardial cavity allows the heart movement to be flexible. The pericardial cavity surrounds the heart totally except at the inlet and outlet of the cardiac vessels, where they form two significant tubes. One of the tubes serves as an interconnection to the inferior and superior vena cava and the pulmonary veins, whereas the other connects the aorta and the pulmonary trunk. Blood Supply and Innervation of the

Read More
1075 Words | 5 Pages

This type of shock occurs when the heart is unable to pump blood effectively. This is evident to patients who have had myocardial infarction, such as John’s case. In this illness, the heart has decreased contractility resulting to decreased cardiac output. Such decrease will stimulate the sympathetic nervous system to activate the compensatory mechanism by increasing the heart rate as evident in John’s vital sign to increase the peripheral pressure and ventricular

Read More
1726 Words | 7 Pages

This pressure produces when the heart contracts during the heartbeat cycle, which forces blood out

Read More
540 Words | 3 Pages

The oxygen rich blood then flows by the pulmonary veins to the left side of the heart.

Read More
1173 Words | 5 Pages

High blood pressure, or hypertension, occurs when your blood pressure increases to unhealthy levels. Your blood pressure measurement takes into account how quickly blood is passing through your veins and the amount of resistance the blood meets while it’s pumping. Hypertension is quite common. In fact, 75 million American are living with the condition. Hypertension may develop over the course of several years.

Read More
367 Words | 2 Pages

High blood pressure is a common condition that a lot of people sufferer from. This is when the force of blood on the walls of your arteries is either too high. Arteries are blood vessels that carry blood away from the heart to supply your tissues with oxygen and nutrients. In the hearts two chambers called ventricles contact with each other heart beat to push blood to the lungs and through the arteries the body. As blood flows through them three main factors affect pressure on your artery walls the first is the cardiac output or the amount of blood your ventricles push out of your heart every few minutes.

Read More
999 Words | 4 Pages

The process goes as follows; oxygen and nutrient deprived blood enters the right chamber of the heart, where the blood would then be pumped away to be refilled with oxygen. The new, oxygen and nutrient filled blood would then enter the opposite chamber on the other side of the heart where the blood would be

Read More
1583 Words | 7 Pages

In other words, the increase in stroke volume occurs as a result of improved ventricular force of contraction. Heterometric and homeometric control governs myocardial force of contraction. While homeometric control is independent of the myocardial fibres length at the end of diastole, heterometric control depends on this length of myocardial fibres at the diastole end and is mainly influenced by the venous return (Agarwal et al. CC06). The respiratory pump, as well as venoconstriction skeletal muscle pump, influences the rise in venous return during physical activity.

Read More
1479 Words | 6 Pages

Introduction This essay will reflect on my personal experience, skills, and knowledge gained from my studies and practice of undertaking blood pressure (Bp) whilst completing my professional placement. Bp may be defined as a force of blood against vessel walls in the body, consisting of systolic and diastolic pressure measured in millimeters of mercury. (Waugh and Grant, 2016) Systolic pressure occurs when the hearts left ventricle contracts and forces blood into the aorta causing a heightened atrial pressure, while diastolic pressure refers to complete cardiac diastole, this is when the aortic valve closes and pressure is at its lowest between beats, blood moves into smaller corresponding vessels and the heart rests.

Read More
736 Words | 3 Pages

Then blood moves down into the left ventricle. It is then pumped into the ascending aorta. From the aorta, the oxygen-rich blood is sent to the brain, to the heart muscle, and to the lower body. Blood returning to the heart from the fetal body contains carbon dioxide and waste products as it enters the right atrium. It flows down into the right ventricle.

Read More
1677 Words | 7 Pages

Introduction: BLOOD PRESSURE (BP) is defined as the "pushing force exerted by the blood against the vessel walls". This pressure is highest in the arteries and lowest in the veins. As a result, the blood moves from the arteries through the organs into the veins and back into the heart to begin the cycle over again. The heart acts as a pump to create the high arterial pressures that keep the blood flowing.

Read More
853 Words | 4 Pages

What is Blood Pressure and When Should You Start Monitoring Yours? Each time your heart beats, blood pushes out of your arteries and blood vessels to circulate in your body and that force pertains to the blood pressure that's measured in two sets of numbers. The top number refers to the systolic blood pressure, or the pressure as your heart beats while pumping blood. The bottom number is the diastolic pressure, or the pressure of the heart at rest in between beats.

Read More

More about Cardiac Muscle Case Study

Related Topics

Open Document