A contemporary case series of lupus myocarditis.

OBJECTIVES: The purpose of this study was to describe clinical phenotype and treatment outcomes in lupus myocarditis (LM), an uncommon but serious manifestation of systemic lupus erythematosus (SLE). METHODS: The study involved a 10-year retrospective case series of hospitalized patients with LM, with a search of a diagnosis database using systemic lupus erythematosus and either myocarditis, cardiomyopathy, or congestive heart failure, and of a pathology database for biopsy-proved LM. RESULTS: Twenty-four patients met the study criteria, with 79% female and 82% white (age: mean (SD), 47.6 (20.4) years; follow-up: mean (SD), 9.2 (6.1) months). The frequency of antibodies SS-A (69%) and anti-RNP (62%) was greater than in published lupus populations (25%-40%). On echocardiography, the mean initial left ventricular ejection fraction was 33.8%, improving to 49.5% after a mean of 7.2 months. All patients received immunosuppression, most with high-dose corticosteroid treatment and subsequent corticosteroid taper. One patient died of cardiogenic shock during hospitalization; two patients died within one year posthospitalization. CONCLUSIONS: A high index of suspicion is necessary in suspected LM. Higher frequency of elevated SS-A and anti-RNP antibody levels in our series than in the literature is suggestive of an LM association. Echocardiography is a useful initial investigation for LM, but patients should be referred early for cardiac magnetic resonance imaging or endomyocardial biopsy to confirm diagnosis if it is clinically indicated in difficult cases.

Papillary fibroelastoma: echocardiographic characteristics for diagnosis and pathologic correlation.

OBJECTIVES: We sought to determine the clinical and echocardiographic characteristics of papillary fibroelastoma (PFE). BACKGROUND: PFE is a rarely encountered cardiac tumor about which relatively little is known. METHODS: Institutional records were reviewed for the years 1980 to 1995 for patients with pathologic or echocardiographic diagnosis of PFE. Group 1 included 17 patients with the pathologic diagnosis of PFE who also underwent echocardiography. Echocardiographic features of PFE were established in group 1. Group 2 included 37 patients with only echocardiographic evidence of PFE. RESULTS: In group 1, 7 (41.2%) of 17 patients had symptoms related to PFE. Neurologic events occurred in 5 (29.4%) of 17 patients. All patients had the tumor surgically removed. During follow-up, no new embolic events occurred. Echocardiographic characteristics of PFE included a small tumor (12.1 +/- 6.5 x 9.0 +/- 4.3 mm), usually pedunculated (14 [94%] of 17 patients) and mobile, with a homogeneous speckled pattern and a characteristic stippling along the edges. PFEs were most common on valvular surfaces (12 [60%] of 20 PFEs) but were not uncommon on other endocardial surfaces (8 [40%] of 20 PFEs). The tumor did not cause valvular dysfunction. In group 2, 16 (43%) of 37 patients were asymptomatic. Five patients (13.5%) had a previous neurologic event. During follow-up (mean 31 months, range 1 to 77), nine neurologic events occurred. CONCLUSIONS: PFEs are associated with embolism, can be diagnosed with echocardiography, are often an incidental clinical finding and do not cause valvular dysfunction.

Prognostic value of exercise echocardiography in 2,632 patients > or = 65 years of age.

OBJECTIVES: We sought to determine the prognostic value of exercise echocardiography in the elderly. BACKGROUND: Limited data exist regarding the prognostic value of exercise testing in the elderly, a population which may be less able to exercise and is at increased risk of cardiac death. METHODS: Follow-up (2.9 +/- 1.7 years) was obtained in 2,632 patients > or = 65 years who underwent exercise echocardiography. RESULTS: There were 1,488 (56%) men and 1,144 (44%) women (age 72 +/- 5 years). The rest ejection fraction was 56 +/- 9%. Rest wall motion abnormalities were present in 935 patients (36%). The mean work load was 7.7 +/- 2.3 metabolic equivalents (METs) for men and 6.5 +/- 1.9 METs for women. New or worsening wall motion abnormalities developed with stress in 1,082 patients (41%). Cardiac events included cardiac death in 68 patients and nonfatal myocardial infarction in 80 patients. The addition of the exercise electrocardiogram to the clinical and rest echocardiographic model provided incremental information in predicting both cardiac events (chi-square = 77 to chi-square = 86, p = 0.003) and cardiac death (chi-square = 71 to chi-square = 86, p < 0.0001). The addition of exercise echocardiographic variables, especially the change in left ventricular end-systolic volume with exercise and the exercise ejection fraction, further improved the model in terms of predicting cardiac events (chi-square = 86 to chi-square = 108, p < 0.0001) and cardiac death (chi-square = 86 to chi-square = 99, p = 0.004). CONCLUSIONS: Exercise echocardiography provides incremental prognostic information in patients > or = 65 years of age. The best model included clinical, exercise testing and exercise echocardiographic variables.

Usefulness of harmonic imaging for left ventricular opacification and endocardial border delineation by optison.

Harmonic and fundamental imaging techniques were directly compared in 20 patients undergoing intravenous contrast echocardiography for enhancement of left ventricular endocardial border definition. Harmonic imaging demonstrated significantly enhanced left ventricular endocardial border detection and improved the duration and intensity of a contrast effect despite a reduced dosing requirement.

Variability of myocardium at risk for acute myocardial infarction.

The objective of this study was to assess the variability in myocardium at risk and relate this to coronary angiographic variables. One hundred ninety-seven patients with > or = 1-mm ST-segment elevation in 2 contiguous electrocardiographic leads, without prior myocardial infarction, were injected with technetium-99m sestamibi acutely before reperfusion therapy. The perfusion defect was quantified to determine myocardium at risk for infarction. Patients underwent coronary angiography to determine the infarct-related artery and to classify the occlusion as proximal or not proximal. Collateral and anterograde (Thrombolysis In Myocardial Infarction [TIMI] trial) flow were assessed in a subset of 83 patients with angiography before direct angioplasty. Myocardium at risk for infarction in the distribution of the left anterior descending coronary artery was significantly greater (p <0.0001) than that in the circumflex or right coronary artery. In the left anterior descending coronary artery distribution, myocardium at risk for infarction was significantly larger for proximal occlusions (p <0.0001). There was a trend toward greater myocardium at risk for infarction of proximal occlusions (p = 0.14) of the left circumflex but not for proximal occlusions in the right coronary artery distribution (p = 0.47). Multivariate analysis revealed that the infarct-related artery (p <0.0001), TIMI flow (p = 0.0002), and proximal location (p = 0.09) in the infarct-related artery were independent predictors of myocardium at risk for infarction. Thus, infarct-related artery, TIMI flow, and proximal location of occlusion in the infarct-related artery influence the myocardium at risk for infarction, which is highly variable for given location of occlusion.

Assessment of right atrial pressure with 2-dimensional and Doppler echocardiography: a simultaneous catheterization and echocardiographic study.

OBJECTIVE: To derive a clinically useful, noninvasive determination of right atrial pressure. Noninvasive assessment of right ventricular systolic pressure from Doppler-derived tricuspid regurgitant velocity requires an accurate assumption of right atrial pressure. PATIENTS AND METHODS: Seventy-one patients were studied in the cardiac catheterization laboratory, comparing right atrial pressure (measured at mid systole) with simultaneous 2-dimensional echocardiographic measurement of inferior vena cava diameter and Doppler recordings of hepatic vein systolic, diastolic, and atrial reversal velocities. The initial 28 patients were used to derive a clinical algorithm to predict right atrial pressure, which was tested in the subsequent 43 patients. RESULTS: Inferior vena cava dimension correlated directly with right atrial pressure (r2=0.74; P<.001). The systolic filling fraction of the hepatic vein velocity curves correlated poorly with right atrial pressure. However, the correlation between the hepatic vein Doppler sum of systolic forward flow velocity and atrial reversal velocity and right atrial pressure was inverse (r2=0.32; P=.002). With a combination of variables from both inferior vena cava diameter and hepatic vein velocity curves, patients can be divided into those with normal right atrial pressure, mildly increased right atrial pressure, and severely increased right atrial pressure. CONCLUSION: The combined information from inferior vena cava diameter and hepatic vein velocity curves can be used to assess right atrial pressure.

Calcified bicuspid aortic valve mass prolapsing into the left main coronary artery.

We report a case of a mobile calcific mass on the aortic valve that prolapsed into the left main coronary artery of a 51-year-old man. This case and a review of the literature suggest that calcific embolization to coronary arteries is a rare but possibly underrecognized complication of calcified degenerative or bicuspid aortic valves. This potentially catastrophic complication of calcified aortic valves needs to be suspected and recognized in clinical practice.

Variability between methods of calculating mitral valve area: simultaneous Doppler echocardiographic and cardiac catheterization studies conducted before and after percutaneous mitral valvuloplasty.

The purpose of this study was to assess the variability of measuring the mitral valve area (MVA) by the cardiac catheterization (Gorlin) method and two Doppler echocardiographic methods, the pressure half-time and continuity equation methods. The determinants of MVA were measured simultaneously before and after percutaneous mitral balloon valvuloplasty (PBMV). Thirty-three patients with severe mitral stenosis underwent simultaneous measurements of MVA by the three methods immediately before and within 15 minutes after PBMV. After combining all data, the correlation between the catheterization and pressure half-time methods was significant (r = 0.65; p < 0.001), as was that between the catheterization and continuity equation methods (r = 0.64; p < 0.001). However, there was a large degree of variability among the measurements with the three techniques. The mean difference between the catheterization and pressure half-time methods of measuring MVA before PBMV was -0.2 +/- 0.4 cm2 and 0.1 +/- 0.3 cm2 between the catheterization and continuity equation methods. This variability was even more marked after PBMV: -0.5 +/- 0.9 cm2 between the catheterization and pressure half-time methods and 0.4 +/- 0.6 cm2 between the catheterization and continuity equation methods. Although previous studies have shown a good correlation between MVA as measured with the catheterization and two Doppler echocardiographic methods, they included a wide range of MVAs. In our study of patients with hemodynamically significant mitral stenosis, there was a large degree of variability between the catheterization and simultaneously performed Doppler echocardiographic methods. The calculated MVA by any method should not be used as the single measure of severity of stenosis.

Destruction of contrast microbubbles during ultrasound imaging at conventional power output.

Inhomogenous opacification of cardiac chambers has been frequently observed after intravenous administration of long-persisting echocardiographic contrast agents. We observed this phenomenon to be most pronounced at high acoustic powers with incomplete opacification of the left ventricular apex and left ventricular outflow tract. Reducing the acoustic energy to which the contrast was exposed by decreasing transmit power or intermittently suspending insonification resulted in homogenous opacification of the entire left ventricular cavity. We systematically examined the effect of varying insonification power on the persistence of three investigational ultrasound contrast agents in both in vitro and in vivo models. We found an inverse relationship between the insonifying power and the persistence of the contrast agents. Contrast intensity decay could be reduced either by decreasing exposure to ultrasound by minimizing the transmit power of the system or by intermittently suspending ultrasound generation (triggering). Minimization of ultrasound contrast exposure to ultrasound energy thus improves echocardiographic contrast duration and homogeneity.

Contrast dobutamine stress echocardiography: clinical practice assessment in 300 consecutive patients.

In this study we compared non-contrast imaging with contrast imaging of the left ventricle during dobutamine stress echocardiography (DSE). Wall segment visualization, image quality, and confidence of interpretation were determined with and without the use of intravenous Optison, a second-generation echocardiographic contrast agent, in 300 consecutive patients undergoing rest and peak DSE. At rest and at peak stress, the percentage of wall segments visualized, image quality, and confidence of interpretation were better with contrast compared with non-contrast imaging. No significant decrease was seen in wall segment visualization, image quality, or confidence of interpretation from rest to peak stress in images obtained with contrast, unlike the images obtained without contrast from rest to peak stress. The use of the intravenous echocardiographic contrast agent Optison during DSE significantly improved wall segment visualization and image quality at rest and at peak stress, resulting in improved confidence of interpretation.

Harmonic imaging: echocardiographic enhanced contrast intensity and duration.

The intensity and duration of contrast effect within the left ventricular cavity after an intravenous bolus of Levovist Injection were observed with both harmonic and fundamental imaging in nine patients with known or suspected coronary artery disease. Contrast intensity was assessed by a qualitative grading system (0, none; 1, weak; 2, moderate; 3, good) and by videodensitometric analysis of pixel intensity. Duration of left ventricular contrast effect was determined by measuring time from the initial visual appearance of contrast agent to its disappearance. The mean increase in pixel intensity within the left ventricular cavity from precontrast to peak contrast was significantly greater for second harmonic than for fundamental imaging (25.5 vs 7.1; P < 0.012). The mean contrast intensity qualitative score with harmonic imaging was higher (2.6 +/- 0.73 vs 1.2 +/- 0.44; P < 0.01) and the duration of contrast effect was longer (242 +/- 131 s vs 53 +/- 33 s; P < 0.004). Second harmonic imaging significantly enhanced contrast intensity and prolonged visible duration of contrast effect after a peripheral venous injection of Levovist.