OBJECTIVE Our objective was the comparison of combined utility of two-dimensional (2D) transthoracic echocardiography (TTE) and three-dimensional (3D) TTE versus 2D and 3D transesophageal echocardiography (TEE) in evaluation of anatomy of the left atrium appendage (LAA) and for clot formation in LAA. BACKGROUND 2DTEE as semi-invasive method has been for a long time used to visualize the LAA. Improved echocardiography technology has increasingly improved visualization of LAA by 2DTTE and 3DTTE in many patients and decreased the need for TEE performance. METHODS We compared combined 2DTTE and 3DTTE with 2DTEE and 3DTEE in evaluating the LAA for anatomical features and thrombus. Eighty-six patients underwent 2DTTE, 3DTTE, 2DTEE and 3DTEE. RESULTS LAA could be visualized in all patients. 31 % of patients had one lobe, 43% had 2 lobes and 26% had > 2 lobes. Of 86 patients studied, 79 had no thrombus and 7 had thrombus in the LAA by all modalities. Six patients, 3 with atrial fibrillation (AF), and 4 in sinus rhythm (SR) had a suspected thrombus by 2DTEE. Only in one patient 3DTEE cropping has been needed to clearly show thrombus which was suspected in short axis view on 2DTEE as rounded echo dense mass. CONCLUSIONS Our preliminary study suggests that combined 2DTTE and 3DTTE has comparable accuracy to TEE in evaluating the LAA anatomy and pathology in terms of thrombus. Only in inappropriate (obese) patients 2TTE, but not 3DTTE, may misdiagnose pectinate musculature as thrombus.

Brain natriuretic peptide (BNP) is released from ventricular myocites due to their stretching and volume overload. In heart failure there is BNP release. Aim of this study was to observe BNP release in acute myocardial infarction (AMI). We measured BNP in 75 patients with AMI. Control group (n=61) was similar by age and gender to AMI group. We found statistically significant elevation of BNP compared to controls (462.875 pg/ml vs 35.356 pg/ml, p< 0.001). Patients with severe systolic dysfunction had the highest BNP levels, while patients with the preserved systolic function had the lowest BNP levels (Group with EF< 30% BNP= 1129.036 pg/ml vs Group with EF31-40 % BNP= 690.177 pg/ml vs Group with EF 41-50% BNP= 274.396 pg/ml vs Group with EF> 51% BNP= 189.566 pg/ml, p< 0.001). We found statistically significant light positive correlation between BNP and left ventricle end-diastolic diameter (LVDd) (r= 0.246, p<0.05). and real positive correlation between BNP and peak troponin levels (r= 0.441, p < 0.05). BNP levels were higher in anteroseptal allocation of AMI compared to inferior allocation (835.80 pg/ml vs 243.03 pg/ml, p< 0.001) and in patients who were treated with heparin compared to fibrinolitic therapy (507.885 pg/ml vs 354.73 pg/ml, p< 0.05). BNP is elevated in AMI and is a quantitative biochemical marker related to the extent of infarction and the left ventricle systolic dysfunction. Besides echocardiographic calculation, elevation of BNP could be used for quick and easy determination of the left ventricle systolic dysfunction.

This study evaluated brain natriuretic peptide (BNP) release in acute myocardial infarction (AMI), absolute values as well as pattern of its release. There are two different patterns of BNP release in AMI; monophasic pattern--concentration in the first measurement is higher than in the second one, and biphasic pattern--concentration in the first measurement is lower than in the second one. We observed significance of biphasic and monophasic pattern of BNP release related to diagnostic and prognostic value. We included in this prospective observational study total of 75 AMI patients, 52 males and 23 females, average age of 62.3 +/- 10.9 years with range of 42 to 79 years. BNP was measured and pattern of its release was evaluated. In AMI group BNP levels were significantly higher than in controls (462.88 pg/mL vs. 35.36 pg/mL, p < 0.001). We found statistically significant real negative correlation (p < 0.05) between BNP concentration and left ventricle ejection fraction (LVEF) with high correlation coefficient (r = -0.684). BNP concentrations were significantly higher among patients in Killip class II and III compared to Killip class I; Killip class I BNP = 226.18 pg/mL vs. Killip class II 622.51 pg/mL vs. Killip class III 1530.28 pg/mL, p < 0.001. BNP concentrations were significantly higher in patients with; (i) myocardial infarction vs. controls; (BNP 835.80 pg/mL vs. 243.03 pg/mL); (ii) in pts with positive major adverse cardiac events (MACE) vs. negative MACE (BNP 779.08 pg/mL vs. 242.28 pg/mL, p < 0.001); (iii) in pts with positive compared to negative left ventricle (LV) remodelling (BNP 840.77 pg/mL vs. 341.41 pg/mL, p < 0.001). Group with biphasic pattern of BNP release had significantly higher BNP concentration compared to monophasic pattern group. In biphasic pattern group we found significant presence of lower LVEF, Killip class II and III, LV remodelling and MACE. We found that BNP is strong marker of adverse cardiac events in patients presenting with a myocardial infarction. In our AMI group we found significant elevation of BNP and it is suspected that second peak secretion is not only due to systolic dysfunction and subsequent remodeling of LV but also due to impact of ischaemia. Patients with biphasic pattern probably have worse prognosis due to severe coronary heart disease. Besides its diagnostic role as a simple blood marker of systolic function, BNP is also important prognostic marker who helps making clinical decision about early invasive vs. conservative management.