Regional myocardial systolic function during acute myocardial ischemia assessed by strain Doppler echocardiography.

OBJECTIVES: We sought to evaluate if echocardiographic strain measurements could detect acute myocardial ischemia, and to compare this new method with myocardial velocity measurements and wall motion score index. BACKGROUND: Tissue Doppler echocardiography (TDE) is a promising method for assessing regional myocardial function. However, myocardial velocities measured by tissue Doppler echocardiography (TDE) vary throughout the left ventricle (LV) because of tethering effects from adjacent tissue. Strain Doppler echocardiography (SDE) is a new tool for measuring regional myocardial deformation excluding the effect of adjacent myocardial tissue. METHODS: Seventeen patients undergoing angioplasty of the left anterior descending coronary artery (LAD) were studied. Left ventricular longitudinal wall motion was assessed by TDE and SDE from the apical four-chamber view before, during and after angioplasty from multiple myocardial segments simultaneously. RESULTS: Systolic strain values were uniformly distributed in the different nonischemic LV segments, whereas systolic velocities decreased from basis to apex. During LAD occlusion, strain measurement showed expansion in the apical septal segment in 16 of 17 patients (7.5 +/- 6.5% vs. -17.7 +/- 7.2%, p < 0.001) and reduced compression in the mid-septal segment (p < 0.05) compared with baseline. Segments not supplied by LAD remained unchanged. Tissue Doppler echocardiography showed reduced velocities in all septal segments (p < 0.05) during angioplasty even though LAD does not supply the basal septal segment. Negative systolic velocities were present in 11 of 17 patients. Wall motion score index increased during ischemia (1.3 +/- 0.4, p < 0.05). CONCLUSIONS: The new SDE approach might be a more accurate marker than TDE for detecting systolic regional myocardial dysfunction induced by LAD occlusion.

[Immunomodulating treatment in advanced heart failure--effect of intravenous immunoglobulin]. / Immunmodulerende behandling ved avansert hjertesvikt--effekt av intravenøs immunglobulin.

BACKGROUND: Congestive heart failure is characterised by enhanced immune activation. Immune-mediated mechanisms may play a pathogenic role, hence the growing interest in therapeutic regimens that could modulate the immune response in heart failure. MATERIAL AND METHODS: In the present report we discuss the pathogenic role of immunological and inflammatory mediators in the pathophysiology of heart failure and discuss different treatment modalities with focus on our recent study with intravenous immunoglobulin. In that study 40 patients with symptomatic chronic heart failure and left ventricular ejection fraction (LVEF) < 40% were randomised in a double-blind fashion to receive therapy with immunoglobulin or placebo for a total period of 26 weeks. RESULTS: We found that intravenous immunoglobulin, but not placebo, shifted the cytokine balance in an anti-inflammatory direction, and that such a shift was associated with improvement in LVEF by 5 EF units. Functional capacity and haemodynamic variables also improved. INTERPRETATION: Our study supports the hypothesis that immunological variables might be of significant importance in the pathogenesis of heart failure and it suggests a potential for immunomodulating therapy in addition to optimal conventional cardiovascular treatment regimens in such patients. These issues are further discussed in the present article.

Reduction of left ventricular mass by lisinopril and nifedipine in hypertensive renal transplant recipients: a prospective randomized double-blind study.

BACKGROUND: Cardiovascular disease is the dominant cause of death in renal transplant recipients. Left ventricular hypertrophy (LVH) is a known risk factor. After renal transplantation, persistent hypertension is an important determinant for the further evolution of LVH. The aim of the present study was to compare the effect of an angiotensin converting enzyme (ACE) inhibitor (lisinopril) with a calcium channel blocker (CCB) (controlled release nifedipine) in treatment of posttransplant hypertension focusing on changes in LVH. METHODS: One hundred fifty-four renal transplant recipients presenting with hypertension (diastolic BP> or =95 mmHg) during the first 3 weeks after transplantation were randomized to receive double-blind 30 mg nifedipine or 10 mg lisinopril once daily. RESULTS: One hundred twenty-three patients completed 1 year of treatment. Good quality echocardiographic data were available in 116 recipients (62 nifedipine/54 lisinopril) 2 and 12 months posttransplant. Blood pressure was equally well controlled in the two groups throughout the study (mean systolic/diastolic+/-SD after 1 year: 140+/-16/87+/-8 mmHg with nifedipine and 136+/-17/85+/-8 mmHg with lisinopril). Left ventricular mass index was reduced by 15% (P<0.001) in both groups (from 153+/-43 to 131+/-38 g/m2 with nifedipine and from 142+/-35 to 121+/-34 g/m2 with lisinopril). There were no statistically significant differences between the two treatment groups at baseline or at follow-up. CONCLUSIONS: In hypertensive renal transplant recipients with well-controlled blood pressure, there is a regression of left ventricular mass after renal transplantation. The regression of left ventricular mass index is observed to a similar extent in patients treated with lisinopril or nifedipine.

Immunomodulating therapy with intravenous immunoglobulin in patients with chronic heart failure.

BACKGROUND: Congestive heart failure (CHF) is characterized by enhanced immune activation, and immune-mediated mechanisms may play a pathogenic role in this disorder. Based on the immunomodulatory effects of intravenous immunoglobulin (IVIG), we hypothesized that IVIG could downregulate inflammatory responses in CHF patients and have potential beneficial effects on the left ventricular ejection fraction (LVEF). METHODS AND RESULTS: Forty patients with chronic symptomatic CHF and LVEF of <40%, stratified according to cause (ie, ischemic and idiopathic dilated cardiomyopathy), were randomized in a double-blind fashion to receive therapy with IVIG or placebo for a total period of 26 weeks. Our main findings were that (1) IVIG, but not placebo, induced a marked rise in plasma levels of the anti-inflammatory mediators interleukin (IL)-10, IL-1 receptor antagonist, and soluble tumor necrosis factor receptors; (2) significantly correlated with these anti-inflammatory effects, IVIG, but not placebo, induced a significant increase in LVEF from 26+/-2% to 31+/-3% (P:<0.01), and this was found independent of the cause of heart failure; and (3) N-terminal pro-atrial natriuretic peptide decreased significantly after induction therapy and continued to decrease toward the end of study during IVIG therapy (P:<0.001) but remained unchanged during placebo. CONCLUSIONS: We demonstrated an IVIG-induced change in the balance between inflammatory and anti-inflammatory cytokines that favored an anti-inflammatory net effect in CHF. This effect was significantly correlated with an improvement in LVEF, suggesting a potential for immunomodulating therapy in addition to optimal conventional cardiovascular treatment regimens in CHF patients.

Myocardial performance after transmyocardial revascularization with CO(2)laser. A dobutamine stress echocardiographic study.

AIMS: Transmyocardial laser revascularization is a treatment for patients with severe angina pectoris not eligible for conventional revascularization. The effects on myocardial function and reversible ischaemia have not been clarified. METHODS AND RESULTS: One hundred patients with refractory angina not eligible for conventional revascularization were randomized 1:1 to receive continued optimal medical treatment or transmyocardial revascularization with CO(2)laser in addition to medical treatment. Dobutamine stress echocardiography examinations were performed at baseline and at 3 and 12 months after randomization. The effects of transmyocardial revascularization on myocardial function and reversible ischaemia were assessed by visual interpretation of cineloops at rest and during stress in a 16-segment model. After transmyocardial revascularization resting left ventricular wall motion abnormalities increased (P<0.01), whereas wall motion during dobutamine stimulation remained unchanged. The number of probably non-viable segments increased (P<0.01) with a corresponding decrease in the number of ischaemic segments. Fewer patients had the dobutamine infusion discontinued because of chest pain after transmyocardial revascularization with laser, but the chest pain threshold did not increase significantly. CONCLUSION: Following transmyocardial revascularization, resting wall motion abnormalities worsened, wall motion abnormalities during dobutamine stimulation remained unchanged and the number of probably non-viable segments increased.

Acute regional myocardial ischemia identified by 2-dimensional multiregion tissue Doppler imaging technique.

BACKGROUND AND OBJECTIVE: Tissue Doppler echocardiography (TDE) is a promising method for the assessment of regional myocardial function, but pulsed TDE does not provide quantitative data from multiple regions simultaneously. This feature is important for the objective assessment of regional differences in myocardial function. In the present study, we investigated a new off-line TDE method that provides quantitative pulsed velocity data from an unlimited number of regions selected within a 2-dimensional (2D) image. The goal of the study was to determine the ability of this new approach to quantify regional myocardial function during acute myocardial ischemia induced by balloon angioplasty. METHODS: Twenty-two patients undergoing angioplasty of the left anterior descending coronary artery (LAD) were studied. Left ventricular longitudinal wall motion was assessed by 2D TDE from the apical 4-chamber view before, during, and after angioplasty. Images were sampled at a rate of 69 +/- 15 frames/s, and the off-line analysis allowed simultaneous measurement of velocities in multiple myocardial segments. RESULTS: There were 3 major alterations in the systolic velocity pattern during LAD occlusion. Peak early systolic velocities along the apical septum were significantly reduced during LAD occlusion (2.8 +/- 1.2 cm/s to 0.6 +/- 1.7 cm/s, P <.001). Myocardial velocities in mid systole suggested paradoxical wall motion (1.0 +/- 1.2 cm/s to -0.8 +/- 0.9 cm/s, P <.001). When comparing the ischemic regions of the left ventricle with the nonischemic regions, each patient demonstrated lower myocardial systolic velocities in the ischemic region. Furthermore, during early diastole, the wall motion of the ischemic segments showed a postsystolic contraction pattern with velocities changing from -0.9 +/- 1.0 cm/s to 1.9 +/- 1.3 cm/s (P <.001). CONCLUSION: This new 2D TDE approach is able to quantify detailed myocardial velocity profiles from multiple regions simultaneously. Single-beat comparisons of ischemic and nonischemic regions might enhance the sensitivity for diagnosing ischemic heart disease. Reversed systolic wall motion during midsystole and marked positive velocity during early diastole might be new and important markers of myocardial wall ischemia.

Left atrial volumes assessed by three- and two-dimensional echocardiography compared to MRI estimates.

OBJECTIVES: The aim of the present study was to establish the accuracy and reproducibility of left atrial volume measurements by three-dimensional (3D) echocardiography compared to 2D biplane and monoplane measurements. BACKGROUND: No echocardiographic technique is generally accepted as optimal for estimation of left atrial size. METHODS: Left atrial volumes of 18 unselected cardiac patients were obtained with magnetic resonance imaging (MRI) (volumes 145 +/- 58 ml). These volumes were compared with those obtained with different echocardiographic methods: a multiplane 3D method based on 90 images acquired by apical probe rotation, a simplified 3D method using only the three standard apical views, and 2D biplane and monoplane methods based on area-length, disc summation and spherical formulas. RESULTS: The echocardiographic methods significantly underestimated maximum left atrial volumes as obtained by MRI by 14-37% (p < 0.001). Accuracy, expressed as 1 SD of individual estimates around this systematic underestimation, was 25 to 27% for all methods, except for the 2D 2-chamber monoplane method (37%). Interobserver coefficient of variation was between 14 and 20% for all methods (n.s.). CONCLUSION: All echocardiographic methods significantly underestimated left atrial volumes as obtained by MRI. A minor non-significant improvement in individual echocardiographic estimates by the 3D methods was obtained at the cost of more time consumption. In unselected patients ultrasound image quality precludes significant improvement of left atrial volume measurements by the applied 3D methods.

Reversal of intraventricular flow propagation during isovolumic relaxation: A marker of anterior wall dysfunction.

BACKGROUND: Myocardial infarction induces left ventricular (LV) wall motion abnormalities during isovolumic relaxation (IVR) and may potentially alter intraventricular flow during this period. This study evaluated whether 2-dimensional color Doppler measurements of intraventricular flow during IVR were able to identify LV dysfunction caused by coronary artery disease. METHODS: Patients with single-vessel coronary artery disease and posterior wall infarction (21 patients) or anterior wall infarction (27 patients) were included. Eighteen healthy persons served as a control group. LV function was examined by 2-dimensional echocardiography, 2-dimensional color Doppler, and pulsed Doppler techniques. RESULTS: All normal persons (23.6 +/- 10.9 cm/s) and patients with posterior infarction (19.6 +/- 9.3 cm/s) had flow propagation towards LV apex during IVR. Patients with anterior wall infarction had reversed flow direction (-12.2 +/- 8.7 cm/s, P <.001). The echocardiographic wall motion score index of the 4 apical segments correlated well with flow velocities (r = -0.78, P <.001). CONCLUSION: Reversed flow propagation during IVR may become a sensitive clinical marker of regional ischemia.

Diastolic flow pattern in the normal left ventricle.

OBJECTIVES: This study sought to clarify the diastolic flow pattern in the normal left ventricle. BACKGROUND: During left ventricular filling, basally directed (retrograde) velocities are seen in the outflow compartment. These velocities may represent blood returned from the apical region or a shortcut at a more basal level. METHODS: Left ventricular flow patterns were identified in 18 healthy individuals (age 47 +/- 12 years) with the use of high frame-rate two-dimensional color Doppler and color M-mode Doppler echocardiography techniques. Intraventricular velocities were measured with single pulsed Doppler at 3 levels in both inflow and outflow compartments (posterolateral and anteroseptal parts of the left ventricle). RESULTS: During early transmitral flow acceleration, all intraventricular velocities were directed towards the apex. However, after peak early and late inflow velocities and during diastasis, retrograde velocities were identified in the outflow compartment. These retrograde velocities occurred earlier, and were higher, at the level of the deflected anterior mitral leaflet tip compared with more apical levels (P <.001). A velocity pattern was established, consistent with early intraventricular vortex formation behind both mitral leaflets. The vortex adjacent to the anterior leaflet subsequently enlarged to include a major part of the left ventricle. CONCLUSION: Uniform diastolic flow patterns were identified in the normal left ventricles. The findings suggest that both early and late diastolic filling start with an initial motion of a fluid column, succeeded by vortex formation, which explains retrograde flow in the outflow compartment.

[Late complications after treatment of Hodgkin's disease]. / Senkomplikasjoner etter behandling for Hodgkins sykdom.

Treatment of Hodgkin's disease involves chemotherapy and radiation. Both modalities may cause cardiac, pulmonary and thyroid side-effects. In a cross-sectional study, we aimed to assess the occurrence and severity of such complications. From 1980 to 1989, 129 Norwegian patients (< 50 years old) had curative treatment for Hodgkin's disease 116 (90%) of them participated in the study (follow-up period 5-13 years). Methods included lung function tests, chest X-rays, bicycle exercise tests, echocardiography and thyroid function tests. Nearly 30% of the patients reported dyspnoea on exertion and had associated reductions in lung function. Evidence of fibrosis occurred in 68%, but was associated with reduced lung function in only 12%. Pathological left-sided heart valve regurgitations were detected in 24% of the patients, pericardial thickening in 15%, and coronary artery disease in 5%. Biochemical hypothyreosis was found in 67% of the patients. We conclude that cardiac, pulmonary and thyroid dysfunctions are frequent long-term side-effects after treatment for Hodgkin's disease. We recommend annual screening of thyroid function and echocardiographic examination in patients who have received standard mantle field radiotherapy without cardiac shielding. Lung function testing should be done in individuals who require further radiation, chemotherapy or thoracic surgery.

[Constrictive pericarditis illustrated by an unusual case report]. / Konstriktiv perikarditt belyst med en uvanlig sykehistorie.

Constrictive pericarditis is an uncommon condition. Previously, tuberculosis or other bacterial infections were prevalent causes, often with prominent pericardial calcification. Presently, many patients with constrictive pericarditis of other aetiologies have lesser degrees of structural changes in the pericardium. We report on a case with severe symptoms where the correct diagnosis was elusive because of absent or minimal preoperative pericardial pathology. The clinical, echocardiographic and haemodynamic features of constrictive pericarditis are reviewed. We recommend thorough echocardiographic evaluation of central haemodynamics in patients with symptoms of heart failure when the aetiology is not readily apparent (e.g. previous myocardial infarction dilated cardiomyopathy or valvular disease.

Left ventricular mass assessed by three-dimensional echocardiography using rotational acquisition.

BACKGROUND: The reproducibility of left ventricular (LV) mass measurement by two-dimensional (2-D) echocardiography is inadequate for individual assessments. HYPOTHESIS: This study was undertaken to evaluate the potential of LV mass determination with a new three-dimensional (3-D) echocardiographic method compared with 2-D measurements. METHODS: Porcine agarose-filled left ventricles (n = 15, true mass 61-511 g) of different shapes were measured by a multiplane 3-D method based on 90 images acquired by probe rotation axis (1) perpendicular and (2) parallel to the ventricular long axis ["parasternal" (the left sternal border was not present as a reference point in this study) and apical views]. Mass was also obtained using (3) the biplane truncated ellipsoid and (4) area-length methods, as well as (5) the modified cube formula. Five hearts were not analyzed with the apical 3-D technique because of insufficient image quality. RESULTS: Systematic deviation from true mass was small with all methods (< 5.3%). Accuracy, expressed as 1 standard deviation of individual estimates around this systematic bias, was 7.7, 13.6, 8.2, 11.9, and 11.9% of true mass for the methods 1-5, respectively. Interobserver reproducibility, expressed as the coefficient of variation, was 4.7, 8.8, 8.1, 8.9, and 9.4% for the same methods. CONCLUSION: Limits for individual accuracy and reproducibility of LV mass estimates are nearly doubled using apical compared with "parasternal" 3-D echocardiography in vitro. A main advantage of "parasternal" 3-D compared with 2-D LV mass estimates is better reproducibility, but at the expense of greater time consumption. Apical 3-D technique is not superior to simpler 2-D methods based on "parasternal" short axis imaging.

Hemodynamic characterization of the CarboMedics mitral valve prosthesis.

BACKGROUND AND AIMS OF THE STUDY: The hemodynamic function of the CarboMedics bileaflet mitral valve prosthesis was evaluated by Doppler echocardiography and by heart catheterization. The clinical state of the invasively examined patients was evaluated before and after surgery. METHODS: Doppler echocardiography was performed in 54 patients at six months after surgery. Further, combined right and left heart catheterization was performed in 22 of these patients before surgery and at six months thereafter. RESULTS: The Doppler mean gradients were small (3.6 +/- 1.2 mmHg), and corresponded well with Doppler mean gradients in the subgroup examined with both methods (3.5 +/- 1.1 mmHg) and with the invasive gradients (3.4 +/- 1.9 mmHg); there was also no difference between the different valve sizes. Clinically, pressure recovery distal to the valve is probably so small that no systematic difference between the two techniques of measurement is present. Only physiological regurgitation was found, and no case of valve dysfunction. The patients improved from functional NYHA class 3.1 +/- 0.4 to 1.4 +/- 0.6, regardless of preoperative diagnosis, with most pronounced improvement in those with mitral stenosis. Pulmonary artery pressure was normalized. Pulmonary vascular resistance and cardiac index improved slightly. CONCLUSIONS: In conclusion, the valvular prostheses demonstrated excellent hemodynamic function. There was striking agreement between the small invasive and non-invasive gradients. Finally, the functional status of the patients improved considerably, most distinctly in those patients with prior mitral stenosis.

Post-transplant hyperlipidaemia: low-dose lovastatin lowers atherogenic lipids without plasma accumulation of lovastatin.

OBJECTIVES: The purpose of the present study was twofold. First, to determine the frequency of hyperlipidaemia after heart transplantation (Tx) in relation to values obtained before Tx. Secondly, to examine the effect of low-dose lovastatin on possible antiatherogenic mechanisms and test the hypothesis that the side-effects are dose-dependent. SUBJECTS AND DESIGN: Retrospective study of the frequency of hyperlipidaemia disturbances in heart transplant patients. In addition, in a prospective study, the safety and efficacy of incremental low doses of lovastatin up to 20 mg day-1 were studied, with measurements of its plasma concentration in 24 cyclosporin A treated heart (n = 14) and kidney (n = 10) recipients with total cholesterol > 7.5 mmol L-1. RESULTS: Cholesterol increased markedly after heart transplantation from a pretransplant value of 5.3 (5.0,5.6) mmol L-1 to 6.7 (6.4,7.0) mmol L-1 after 1 year and then remained constant, but this increase was largely due to a 'normalization' since cholesterol decreased significantly during increasing heart failure before transplantation. Treatment with lovastatin decreased total cholesterol by 19% (P < 0.001), primarily by an effect on LDL cholesterol. HDL cholesterol increased by 15% (P < 0.05), whereas triglycerides remained unchanged. Lovastatin also caused a significant reduction in apolipoprotein B of 16%, and lipid peroxidation of 40%, whereas apolipoprotein A-I, fibrinogen, and glycerol were unchanged. Plasma concentration of lovastatin was significantly higher in transplant recipients compared with controls, but there was no accumulation during incremental dosing of lovastatin. The drug was well tolerated without significant symptoms or evidence of myopathy. CONCLUSIONS: Hyperlipidaemia is common after cardiac transplantation. Treatment with low dose lovastatin is well tolerated and has a favourable effect on atherogenic lipids.

Surgical elimination of an atrial septal aneurysm causing cerebral embolism.

Atrial septal aneurysms have been recognized as sources of arterial embolism. An intraatrial aneurysm was demonstrated in the fossa ovalis of a 45-year-old woman who suffered an episode of cerebral embolism. The disorder is rarely treated surgically. Most patients with this condition are given life-long anticoagulation, a treatment that may have serious complications. As an alternative treatment with possible lower risk, we removed the aneurysm surgically.

Cardiac findings in generalized lipodystrophy.

The cardiac findings in eight patients, two of whom were female, with total lipodystrophy (Berardinelli-Seip's disease) are reported. One of them had the acquired form of the disease. Four patients died at a mean age of 32 years. As far as we know, at least three of them most likely died for cardiac reasons, one shortly after recovering from an attempted suicide. All eight patients had hypertrophic hearts, mostly with deranged diastolic, but also systolic, function. One had pulmonary hypertension. We conclude that generalized lipodystrophy is a serious disease with cardiac affection leading to cardiac dysfunction and early death. There is no specific cardiac treatment, and the treatment should be according to the general guidelines for patients with hypertrophic, dysfunctioning hearts.

Increased risk of heart valve regurgitation after mediastinal radiation for Hodgkin's disease: an echocardiographic study.

OBJECTIVE: To assess by echocardiography the occurrence and degree of late cardiac sequelae after treatment for Hodgkin's disease by radiation and chemotherapy. PATIENTS AND METHODS: In Norway from 1980 to 1988, 129 patients < 50 years old with Hodgkin's disease had curative treatment with mediastinal radiation, with or without chemotherapy. 116 (90%) of these patients (mean (SD) age 37 (7) years, 67 males) were examined by echocardiography 5-13 years after treatment. 40 healthy individuals (mean (SD) age 40 (11), 20 males) were examined as controls. All those examined were in regular sinus rhythm. RESULTS: Grade > 1 (scale 0-3) aortic and/or mitral valvar regurgitation was found in 24% of the patients (15% aortic, 7% mitral, and 2% aortic+mitral), affecting 46% of the females v 16% of the males (P < 0.001). Female gender was a significant risk factor for aortic and mitral regurgitation (odds ratio 4.7, 95% confidence interval 2.0 to 11.2), whereas age, period of follow up, radiation dose, and chemotherapy were not. Thickened pericardium was diagnosed in 15% of the patients. No risk factors were identified. No cases of pericardial thickening or valvar regurgitation grade > 1 were recorded in the control group. Mean values for measured and calculated indices of systolic and diastolic function were within the normal range for patients and controls. The patients had reduced E/A ratio compared with the healthy controls (E/A 1.1 v 2.0, P < 0.001). CONCLUSIONS: Abnormal left sided valvar regurgitation was detected in one fourth of the patients, affecting the aortic valve in more than half of the cases. Females had an increased risk of valvar regurgitation. Echocardiographic screening after high-dose mediastinal radiation is recommended.

Cardiopulmonary sequelae after treatment for Hodgkin's disease: increased risk in females?

BACKGROUND: The treatment of Hodgkin's disease (HD) involves irradiation and chemotherapy. Both modalities may cause heart and lung injury. We aimed to assess 1) the occurrence of such injury, 2) the extent to which combined versus single-organ-affection resulted in disability, and 3) whether determinants for cardiopulmonary injury could be identified. PATIENTS AND METHODS: A national cohort (n = 116) of HD patients (mean age 37 +/- 7 (SD) years, 67 males) was examined by interview, echocardiography, bicycle exercise test and lung function tests, 5-13 years after mediastinal irradiation with or without chemotherapy. RESULTS: Cardiac, pulmonary or combined sequelae occurred, respectively, in 21%, 15% and 19% of the patients affecting 75% of the females versus 41% of the males (P < 0.001). Of the patients with combined sequelae, 27% were disabled versus 4% of the rest (P < 0.05). Combined sequelae was associated with dyspnoea (P < 0.001) and reduced maximal exercise heart rate (P < 0.05). Compared to males, females had an increased risk of heart valve regurgitation (46% versus 16%, P < 0.001), pericardial thickening (22% versus 10%, P = 0.07) and reduced gas transfer (41% versus 22%, P = 0.03). Female gender was a significant risk factor for cardiac and/or pulmonary sequelae (OR 6.1, 95% CI 2.4-15.7), whereas age, follow-up period, smoking habits, histology, bulky mediastinal disease, radiation dose and chemotherapy were not. Mean exercise work capacity and O2-saturation were within normal limits. CONCLUSIONS: Although cardiac and/or pulmonary sequelae were detected in more than half of the patients, only combined injury was associated with disability, dyspnoea and reduced performance. Females had an increased risk of cardiopulmonary sequelae, which could not be explained by treatment-related differences between the genders.

The influence of atrioventricular conduction and heart rate on the pulmonary venous flow pattern.

The pulmonary venous flow (PVQ) pattern usually has two antegrade flow waves, corresponding to ventricular systole and diastole, respectively, and is used to assess left atrial pressure. To study the effects of atrioventricular conduction (AVD) and heart rate (HR) on the PVQ pattern, transthoracic pulsed Doppler recordings of pulmonary venous, transmitral, and aortic flow were made in five healthy subjects with dual-chamber pacemakers. Recordings were made at HRs of 80, 100, and 120 beats/min, with AVDs of 75, 150, and 220 msec at each HR. When the AVD was increased, the biphasic PVQ changed to a monophasic pattern in which a single flow wave covered the transition between ventricular diastole and systole. There was a shift of flow from ventricular systole to diastole. When HR was increased, the systolic fraction of the PVQ increased as a result of an increase in the relative duration of systole. In conclusion, AVD and HR influenced the PVQ pattern in subjects without signs of ventricular dysfunction. This may be a limitation to the use of the flow pattern to assess left atrial pressure.