The Tell Tale Heart ( ANNOTATED )

Product Information

I’ve been sent the report from my echocardiogram but I don’t understand all the terms, like left ventricular systolic dysfunction (LVSD) and ejection fraction (EF). What do these mean? Kelly Victor says: j Decide which you think is the right side of the heart and which is the left. What has helped you to decide? m Look at the left-hand diagram. Make a long cut down through the aorta and the left ventricle to the tip of the heart (‘apex’), as shown in the diagram. The position of the blood vessels on the surface will help you to make this cut in the right place. Identify the coronary artery that supplies the heart muscle itself with blood. The heart contains 4 chambers: the right atrium, left atrium, right ventricle, and left ventricle. The atria are smaller than the ventricles and have thinner, less muscular walls than the ventricles. The atria act as receiving chambers for blood, so they are connected to the veins that carry blood to the heart. The ventricles are the larger, stronger pumping chambers that send blood out of the heart. The ventricles are connected to the arteries that carry blood away from the heart.

The heart develops from the fusion of two endocardial cardiac tubes of endodermal origin into a primitive heart tube which then undergoes a complex series of dilatations, twisting, and septation in the first month which is covered in detail in the article development of the heart. Variant anatomy o Look at the right-hand diagram. Cut carefully upwards into the left atrium along the line shown in the diagram.

28 Comments

The bundle of His branches into the left and right bundle branches which travel down the interventricular septum.

It had become so pitch dark that we listeners could hardly see one another. For a long time already he, sitting apart, had been no more to us than a voice. There was not a word from anybody. The others might have been asleep, but I was awake. I listened, I listened on the watch for the sentence, for the word, that would give me the clue to the faint uneasiness inspired by this narrative that seemed to shape itself without human lips in the heavy night-air of the river. The heart is subdivided by septa into right and left halves, and a constriction subdivides each half of the organ into two cavities, the upper cavity being called the atrium, the lower the ventricle. The heart, therefore, consists of four chambers:

Heart valves

h Look inside the main arteries and veins. If you see any structures attached to the walls, try to decide what they are, what they might do, and how they might work. All of the deoxygenated blood from the body drains into the venous system and enters the right side of the heart, specifically the right atrium. An echocardiogram (or echo) is an ultrasound of the heart. During an echo, we record short videos of the heart as it beats, and from these videos we can learn about the structure and function of the heart. The left ventricle is the main pumping chamber of your heart – it is the one where blood leaves your heart to be pumped around your body. Because it is doing all this work, it is the largest and most muscular of the four chambers of your heart. Blood will then exit the right ventricle through the pulmonary valve and enter the lungs to be oxygenated. blood moves into this chamber through the tricuspid valve (aka right atrioventricular valve) during ventricular diastole; blood moves out of this chamber through the pulmonary valve during ventricular systole

Schoepf U, Zwerner P, Savino G, Herzog C, Kerl J, Costello P. Coronary CT Angiography. Radiology. 2007;244(1):48-63. doi:10.1148/radiol.2441052145 - Pubmed This is a short 3-D animation of the heart in action, showing the detailed movement of the valve flaps and the heart muscle. The commentary has an American accent, but is quite clear. Sometimes, the pacemaker of the heart stops functioning properly (this can cause an irregular heartbeat) I don't want to bother you much with what happened to me personally," he began, showing in this remark the weakness of many tellers of tales who seem so often unaware of what their audience would like best to hear; "yet to understand the effect of it on me you ought to know how I got out there, what I saw, how I went up that river to the place where I first met the poor chap. It was the farthest point of navigation and the culminating point of my experience. It seemed somehow to throw a kind of light on everything about me -- and into my thoughts. It was sombre enough, too -- and pitiful -- not extraordinary in any way -- not very clear either. No, not very clear. And yet it seemed to throw a kind of lightTo allow for improved image quality and dose reduction, cCTA is usually ECG-triggered to adapt the scan sequence to the patient's heartbeat. Before we dive into what those structures are, let’s briefly review the blood flow through the heart. The heart is also difficult because the fatty tissue that surrounds the heart can obscure the openings to the vessels. This means that you really must experience the heart with your hands and feel your way to find the openings. Many people will be squeamish about this, and because the heart is slippery, it is easy to drop. Don't be shy with the heart, use your fingers to feel your way through the dissection. The left ventricle is responsible for pumping blood to the whole body. Oxygenated blood is pumped to the whole body through the aorta. Which chamber receives deoxygenated blood from the body? Safety of handling butcher material: Anything that a butcher sells must have been passed as ‘fit for human consumption’, but may be carrying food-poisoning bacteria. We don’t wear gloves when preparing meat in a kitchen, so it is not necessary to wear gloves, but it is necessary to wash hands thoroughly after handling the material and before leaving the laboratory. The government has enacted the Specified Risk Materials (SRM) Regulations and these determine the parts of slaughtered animals which may be capable of transmitting spongiform encephalopathies and therefore must not be supplied. Only materials from cattle, sheep and goats are currently specified and only under certain circumstances. Thus anything that you can obtain through normal channels should not be SRM and could therefore be used. Do not store the material used for dissection in refrigerators used for food.

The ventricles are separated by two grooves, one of which, the anterior longitudinal sulcus, is situated on the sternocostal surface of the heart, close to its left margin, the other posterior longitudinal sulcus, on the diaphragmatic surface near the right margin; these grooves extend from the base of the ventricular portion to a notch, the incisura apicis cordis, on the acute margin of the heart just to the right of the apex. Cardiac wall It is very easy to remember which is which if you use a mnemonic! Just memorise LAB RAT and you're set! In about forty-five seconds I found myself again in the waiting-room with the compassionate secretary, who, full of desolation and sympathy , made me sign some document. I believe I undertook amongst other things not to disclose any trade secrets. Well, I am not going to tricuspid valve (aka right atrioventricular valve) drains blood from the right atrium when it is open during ventricular diastoleThe heart is able to both set its own rhythm and to conduct the signals necessary to maintain and coordinate this rhythm throughout its structures. About 1% of the cardiac muscle cells in the heart are responsible for forming the conduction system that sets the pace for the rest of the cardiac muscle cells. The human heart has four chambers. Left atrium, left ventricle, right atrium, and right ventricle. What type of muscles make up the heart?