Cardiovascular Physiology Concepts: Richard E Klabunde: 9781451113846: Amazon.com. Cardiac Electrical Activity. 19. The Basis of ECG Diagnosis. 19.1.1 About the possibilities to solve the cardiac inverse problem As discussed in Chapter 7, no unique solution exists for the inverse problem. From clinical practice it is possible to make accurate ECG diagnoses in some diseases and to estimate other diseases with an acceptable probability. How can this discrepancy between theory and practice be explained? It was said in Chapter 7 that the inverse solution is impossible if measurements cannot be made inside the source and if no additional information about the nature of the source is available.
There is, however, much knowledge of the electrophysiological behavior of the heart. This limits the degrees of freedom of the source and reduces the degree of uncertainty in reaching a diagnosis. These anatomical and physiological constraints limit the degrees of freedom of the inverse solution and usually make it possible to obtain solutions. 19.1.2 Bioelectric principles in ECG diagnosis Netter FH (1971): Heart, Vol. 5, 293 pp. Summary of ECG Abnormalities. The Heart. Before studying the heart, I would just like to mention the anterior mediastinum and what its contents are. This part of the mediastinum contains connective tissue and fat, as well as, a few blood vessels, maybe a lymph node or two and, sometimes, the lower end of what used to be the thymus.
It also contains the anterior folds of the pleura, the costomediastinal folds. The heart and its pericardium make up the contents of the middle mediastinum. The left and right phrenic nerves and their adjacent arteries (pericardiacophrenic) lie to the left and right of the pericardium and anterior to the roots of the lungs. Within the pericardial cavity, at the points where the visceral and parietal pericardia are continuous with one another, small chambers or sinuses are located. In this diagram, the heart has been removed and you are looking toward the posterior wall of the pericardial cavity.
For those of you studying the cadaver heart, the problem of orientation invariably crops up. Aortic Arch Vessels. Isc.temple.edu/marino/2005/CV/Development of the Cardiovascular System06.pdf. Interatrial Septum Development.mp4. Pericardium - dissection. Cardiovascular Embryology. Early Heart and Primitive Heart Tube Folding.mp4.