Echocardiography – new and evolving roles
Echocardiography plays a key role in the diagnosis of many cardiac conditions and in the assessment of response to therapy. Despite the emergence of new, advanced diagnostic tools such as cardiac computed tomography and cardiac magnetic resonance, echocardiography still plays an important role in patient care because of its unique capabilities.
Transesophageal echocardiography – TEE
For more precise evaluation of cardiac structures and major cardiac vessels we use TEE.
Transesophageal echocardiography examination requires cooperation of conscious patient and active swallowing of TEE probe. Depending on disease pathology that is evaluated, examination lasts from 3 to 5 minutes and is dealing only with the problem of concern.
The atherosclerotic disease takes changes in the structure of arterial vessels derived by aging and undesirable effects of fat metabolism with the interplay of thrombocites and intrinsic humoral response. The pyramid of atherosclerotic disease can be detected at different stages and with different ultrasound tools. Stress echocardiography detects the tip of the atherosclerotic iceberg, i.e., the hemodynamically significant, ischemia-producing coronary artery stenosis through unmasking of stress-induced regional ventricular dysfunction.
Ergometry- Exercise test
It is categorized in functional diagnostics of the heart. It is performed either by treadmill or ergo bike, while increasing loading conditions during walking or pedal cycling.
This test can be done by different protocols. The most frequently used is Bruce`s test.
Ambulatory monitoring blood pressure
AMP is diagnostic procedure of 24 hour blood pressure monitoring at every 60 min time interval. It provides precise information about mean values of systolic and diastolic blood pressure, as well as their oscillations around the day. The especial value in the analysis and interpretation has comparing these values with the diary of daily activities, mental and emotional state during 24 hours.
Follow up of electrocardiogram tracings during 24 hours is valuable diagnostic method to evaluate frequency of heart rate and those disturbances in rhythm and conduction of electric heart impulses.
One of the possible analyses is revealing the existence of coronary heart disease.
However, it is a beneficiary method to evaluate the effects of given therapy. Therefore, it is possible to follow up medicamentous response.
Highly resolutive vector analysis of QRS loop by time integral is capable of deligninig localization of tissue damage or volume overload. Much more precise than standard ECG.
By this diagnostic method very tiny damages of the heart may be visible. It is a rule out method for confirmation or rejection of some certain heart diseases.
It may show early changes even though ECG looks normal (par exam. some cases of heart infarction or lung embolism).
Signal averaged ECG analysis of low frequency oscillation before and after QRS complex.
It is used in the follow up of disease progression and monitoring of therapeutic effects: proarrhythmogenic side effect even/or synergistic effect of two drugs making proarrhythmogenic milieu.
It is complementary to 24 hour ECG monitoring. It gives precise information about proarrhythmogenic features of one’s heart.
HRV (Heart rate variability)
This test duration is eighter 20min or 24 hour, depending on clinical indication. It gives numerous physiological and pathophysiological insights in a majority of internal and neural diseases.
Time domain analysis: shows proarrhytmogenic state
Frequency domain analysis: shows functioning of ANS
Non linear analysis: shows predisposition to SCD
Symbolic dynamics: shows risk for SCD
TO (Turbulence onset)
TO is a noninvasive diagnostic method intended for detecting risk of serious arrhythmia or therapeutical drug follow up or even pace maker success.
It could be used in numerous cardiovascular states, but most benefit goes to intensive care unit patients in prognostic sence.