[Severe infection following arteriotomy with Angio-Seal]. / Infection grave compliquant une angioplastie avec utilisation d'Angio-Seal((R)).

Diagnostic or interventional femoral artery catheterizations are more and more commonly practiced, so are haemostatic puncture closure devices, used to prevent bleeding complications and decrease hospital length of stay. Complications, such as infections, have been reported after using haemostatic puncture closure devices. We report the case of a female patient presenting with severe infection after Angio-Seal use: femoral artery infection with sepsis and multiple organ failure, septic embolism with embolic skin abscesses, bacterial arthritis and inferior limb necrosis. Studies comparing the infectious risk of manual compression versus haemostatic puncture closure devices are contradictory. Nevertheless, aseptic rules must be strictly observed. Indications for these devices concern only patients with high risk of hemorrhage and should be discussed for immunodepressed, diabetic, or obese patients.

[Metastasis stimulating a myocardial infarction]. / Métastase simulant un infarctus du myocarde.

A patient with a history of bronchial carcinoma was admitted to the coronary care unit with chest pain suggestive of infarction and an ECG showing changes compatible with acute lateral wall infarction. The coronary arteries were shown to be normal and echocardiography revealed an intracardiac mass which MRI confirmed to be a direct extension of the pulmonary tumour. Echocardiography should be performed systematically in patients with chest pain and ECG changes of ischaemia who also have progressive oncological disease.

[Pulmonary embolism with right intra-auricular thrombus. Fatal outcome during fibrinolysis]. / Embolie pulmonaire avec thrombus intra-auriculaire droit. Décès au cours d'une fibrinolyse.

INTRODUCTION: The spontaneous prognosis of pulmonary embolism associated with mobile intra-cardiac thrombus is most severe, and the choice of a therapeutic strategy is often difficult. OBSERVATION: The treatment of a patient with intravenous fibrinolytics for massive pulmonary embolism and right atrium thrombus was complicated by his early death. We attributed his death to the migration of the intra-cardiac thrombus. Indeed, the cardiac ultrasound, performed when the patient's hemodynamic state had worsened, revealed the complete disappearance of the thrombus too early to correspond to its complete lysis (30th minute of fibrinolysis). COMMENTS: In this pathology, several therapeutic approaches are possible. Surgical removal of the embolus has been validated, but cannot be proposed to all patients since it is a high-risk intervention. Fibrinolysis is generally efficient but exposes the patient to the risk of migration of the intra-cavity thrombus with occasionally deleterious evolution (as in our patient). Heparin treatment alone has been proposed as an alternative when the other two techniques are contraindicated. These techniques currently require assessment in a randomized study, in order to define the appropriate therapeutic strategy.

Should one use echocardiography or contrast transcranial Doppler ultrasound for the detection of a patent foramen ovale after an ischemic cerebrovascular accident?

Patent foramen ovale is frequently associated with embolic cerebrovascular accidents. The diagnosis of patent foramen ovale is easier since the advent of transesophageal echocardiography. However, this method is semi-invasive and is not readily available in all units. Contrast transcranial Doppler ultrasound enables the detection of the passage of a contrast material injected into a peripheral vein to the cerebral circulation across an orifice which is most often a patent foramen ovale. Contrast transcranial Doppler ultrasound may facilitate, with a high sensitivity and specificity, the diagnosis of a patent foramen ovale when a transesophageal echo is not possible. However, transesophageal echocardiography remains the preferred test especially in the young since other potentially embolic sources, such as a thrombus in the left atrium, may be demonstrable.

Use of ambulatory blood pressure monitoring data to predict left ventricular mass in hypertension.

BACKGROUND: Many studies have shown definite but weak correlations between 24h blood pressure and left ventricular mass in hypertension. OBJECTIVE: The present study applied an original multivariate analysis of parameters from ambulatory blood pressure monitoring to predict left ventricular mass in hypertension. METHODS: Two hundred untreated hypertensive subjects (age=51+/-13 years, clinic blood pressure=163/98mmHg) had echocardiography and 24h recording of blood pressure. Data from 102 subjects were used to construct a mathematical model for prediction of left ventricular mass. The remaining 98 subjects were used to validate the model. RESULTS: The model included age, weight, height, 24h systolic blood pressure, heart rate over 24h, standard deviations of systolic blood pressure and of heart rate over 24h. Using this model, we explained 63% of the variance of left ventricular mass. Moreover, the model was validated for the correlation (r=0.70) between measured and the estimated left ventricular mass. CONCLUSIONS: Systolic blood pressure, heart rate and their standard deviations over 24h contribute to left ventricular mass in hypertensive subjects. Thus, it is important to take into account not only blood pressure but also heart rate in clinical studies.

Effects of amlodipine on baroreflex and sympathetic nervous system activity in mild-to-moderate hypertension.

To investigate the effect of amlodipine on baroreflex sensitivity and sympathetic system activity, 36 patients with essential hypertension were randomized to once-daily, double-blind treatment with amlodipine 5 mg or placebo 5 mg for 60 days. Measurements with a Finapres device allowed calculation of baroreflex sensitivity and blood pressure (BP) variability. Adrenergic activity was assessed via measurements of lymphocyte beta2-adrenoceptors and plasma catecholamine concentrations. Compared with placebo, amlodipine significantly decreased BP, but did not significantly alter baroreflex sensitivity. Spectral analysis of Finapres data showed that, compared with placebo, amlodipine decreased the variability of systolic blood pressure, diastolic blood pressure, and RR interval in the low frequency band. There were no simultaneous changes in adrenergic function, however, suggesting that these effects of amlodipine were not mediated via sympathetic nervous system activation.

Metastatic phaeochromocytoma: risks of diagnostic needle puncture and treatment by arterial embolisation.

A 62-year-old man had an acute episode of hypertension 72 h after fine needle aspiration biopsy of an intra- hepatic nodule. The patient had been operated 3 years previously for a right adrenal phaeochromocytoma with no evidence of metastases at that time. Thus, a relapse of the tumour was postulated and confirmed by raised levels of urinary metanephrines. The extent of the metastases precluded surgical intervention and thus localised embolisation was proposed and permitted a clinical stabilisation over 8 months. This case indicates the necessity of long-term post-operative follow-up of phaeochromocytoma as well as the dangers of fine needle aspiration biopsy of metastases from this kind of tumour. Treatment of malignant phaeochromocytoma is difficult and embolisation was a useful therapeutic alternative in this case where the metastases were well defined.

Carotid remodeling in essential hypertension: role of blood pressure, indexed parameters, and association with cardiac mass and aortic stiffness.

The role of blood pressure on carotid remodeling, using no indexed and indexed parameters, was studied in essential hypertension. Carotid parameters were also compared to cardiac mass and aortic stiffness. Forty untreated hypertensive men had echocardiography, carotid ultrasonography and carotidfemoral pulse wave velocity measurements. Cross-sectional area index was associated essentially with the 24-hour systolic blood pressure whereas intima-media thickness was related especially to the 24-hour pulse pressure. Carotid intima-media thickness and cross-sectional area indexes were less related to blood pressure variables than non-indexed parameters. There is an independent association between 24-hour pulse pressure and left ventricular mass index and pulse wave velocity. To conclude, blood pressure, particularly pulse pressure, is associated with vascular and cardiac alterations. The indexation by the body surface area do not provide any additional information in the association between carotid and blood pressure parameters.

[Measurement of carotid artery intima-media thickness. Analysis and reproducibility]. / Mesure de l'épaisseur intima-média carotidienne. Analyse de la reproductibilité.

The intima-media thickness of the carotid artery is a cardiovascular risk factor, especially in hypertensive, diabetic or dyslipidemic patients. Very accurate tools of measurement are essential in order to optimise the analysis of the severity of the vascular lesions. Present methods use computer programmes for ultrasonic image enhancement and have already been shown to be very reproducible. However, there is still room for improvement in the detection of lesions at their initial stage of development and in the follow-up of their progression with or without antihypertensive or lipid lowering drugs.

[Pulmonary embolism and anaphylactic shock caused by rupture of a hepatic hydatid cyst]. / Embolie pulmonaire et choc anaphylactique par rupture d'un kyste hydatique hépatique.

A 44 year old man was admitted to hospital as an emergency for shock associated with giant urticaria and atrial fibrillation. Angiography showed pulmonary embolism, and an image suggesting a hydatid cyst of the liver was observed by echocardiography in the sub-costal view, confirmed by liver ultrasonic scan and serology. After treatment with Albendazole, the cyst was removed surgically and histology showed the characteristic appearances of hydatid disease. The final diagnosis was rupture of a hydatid cyst into a sub-hepatic vein with anaphylactic shock and pulmonary embolism.

High prevalence and persistence of sleep apnoea in patients referred for acute left ventricular failure and medically treated over 2 months.

AIMS: Cardiac failure patients were studied systematically using polysomnography 1 month after recovering from acute pulmonary oedema, and again after 2 months of optimal medical treatment for cardiac failure. METHODS AND RESULTS: This prospective study of consecutive patients was conducted in a cardiac care unit of a university hospital. V o(2)measurements and left ventricular ejection fraction were recorded. Thirty-four patients, initially recruited with pulmonary oedema, improved after 1 month of medical treatment to NYHA II or III. They were aged less than 75 years and had a left ventricular ejection fraction less than 45% at the time of inclusion. Age was 62 (9) years, body mass index= 27 (5) kg x m(-2)and an ejection fraction= 30 (10)%. Eighteen of the 34 patients (53%) had coronary artery disease. Twenty-eight of the 34 had sleep apnoea syndrome with an apnoea+hypopnoea index >15 x h(-1)of sleep. Thus, the prevalence of sleep apnoea in this population was 82%. Twenty-one of 28 (75%) patients had central sleep apnoea and seven of 28 (25%) had obstructive sleep apnoea. Patients with central sleep apnoea had a lower Pa co(2)than those with obstructive sleep apnoea (33 (5) vs 37 (5) mmHg, P<0.005). Significant correlations were found between apnoea+hypopnoea index and peak exercise oxygen consumption (r= -0.73, P<0.01), and apnoea+hypopnoea index and Pa co(2)(r= -0.42, P = 0.03). When only central sleep apnoea patients were considered, a correlation between apnoea+hypopnoea index and left ventricular ejection fraction was also demonstrated (r= -0.46, P<0.04). After 2 months of optimal medical treatment only two patients (both with central sleep apnoea) showed improvement (apnoea+hypopnoea index <15 x h(-1)). CONCLUSIONS: We have demonstrated a high prevalence of sleep apnoea, which persisted after 2 months of medical treatment, in patients referred for acute left ventricular failure. Central sleep apnoea can be considered a marker of the severity of congestive heart failure.

Clinical value of ambulatory blood pressure monitoring.

Ambulatory blood pressure monitoring (ABPM) has now become an established clinical tool. It is appropriate to take stock and assess the situation of this technique. UPDATE ON EQUIPMENT: Important improvements in equipment have occurred, with reductions in weight, in awkwardness and in noisiness of the machines, better acceptability and tolerance by the patients, and better reliability. Validation programmes have been proposed and should be referred to. Limitations of the technique persist with intermittent recording in current practice. The reproducibility is limited in the short-term while recording over 24 h is acceptable. DIAGNOSIS AND PROGNOSIS: White-coat effect (WCE) is manifested as a transient elevation in blood pressure during the medical visit The frequency of this phenomenon, the size of the effect, age, sex and level of blood pressure (BP) or the situation of occurrence (general practitioner, specialist or nurse) have been interpreted differently. It does not seem that WCE predicts cardiovascular morbidity or mortality. White-coat hypertension (WCH) is diagnosed on the evidence of abnormal clinical measures of BP and normal ABPM. The latest upper limits of normality by ABPM recommended by the JNCVI are < 135/85 mmHg while patients are awake and < 120/75 mmHg while patients are asleep. If we accept these upper limits of normality in ABPM, WCH does not appear to be a real problem as regards risk factors or end-organ effects. In terms of prognosis, data are limited. Cardiovascular morbidity seems low in WCH but identical to that of hypertensive subjects in these studies. However, further studies are needed to confirm these results. WCH does not appear to benefit from anti-hypertensive treatment. It is obvious that the lower the BP regarded as the limit of normality, the less likely the occurrence of secondary effects of metabolism, or end-organ effects or complications in those classified as hypertensive. 24 HOUR CYCLE: One of the most specific characteristics of ABPM is the possibility of being able to discover modification or alteration of the 24 h cycle of BP. Non-dippers are classically defined as those who show a reduction in BP of less than 10/5 mmHg or 10% between the day (06.00-22.00 h) and the night, or an elevation in BP. In contrast, extreme dippers are those in whom the BP reduction is greater than 20%. CARDIOVASCULAR SYSTEM: The data remain inconclusive with regard to the existence of a consistent relationship between the lack of a nocturnal dip in blood pressure and target organ damage. As regards prognosis, it seems that an inversion of the day-night cycle is of pejorative significance. CEREBROVASCULAR SYSTEM: Almost all studies have shown that non-dippers had a significantly higher frequency of stroke than dippers. In contrast, too great a fall in nocturnal BP may be responsible for more marked cerebral ischaemia. RENAL SYSTEM: Non-dippers have a significantly elevated median urinary excretion of albumin. There is a significant correlation between the systolic BP and nocturnal diastolic BP, and urinary excretion of albumin. Various studies have confirmed the increased frequency of change in the 24 h cycle in hypertensive subjects at the stage of renal failure. DIABETES: BP abnormalities should be considered as markers of an elevated risk in diabetic subjects but cannot be considered at present as predictive of the appearance of micro-albuminuria or other abnormalities. ABPM is thus of interest in type I or type II diabetes both in the initial assessment and in the follow-up and adaptation of treatment. PHARMACO-THERAPEUTIC USES: The introduction of ABPM has truly changed the means and possibilities of approach to the study of the effects of anti-hypertensive medications, with new possibilities of analysis such as trough-peak ratio smoothness index, etc.

Cardiac and vascular remodelling: effect of antihypertensive agents.

The 1996 World Health Organization (WHO) recommendations for mild hypertension stressed the need to evaluate target-organ lesions as treatment criteria. The effects of both vascular and heart remodelling on hypertension must to be taken into account, as they adversely influence the prognosis of patients with hypertension. It was previously demonstrated that at least three classes of antihypertensive agents were able to decrease morbidity and mortality in patients with hypertension. Meta-analyses have shown that angiotensin-converting enzyme inhibitors seem to have a marked effect on regression of left ventricular hypertrophy (LVH). However, the relationship between drug-induced LVH regression and reduced morbidity and mortality remains to be confirmed. The effect of antihypertensive agents on vascular hypertrophy, as assessed by intima-media thickness, and their involvement in reducing morbid events, also have to be determined at the vascular level. As experimental data have highlighted the involvement of angiotensin II in animal models of LVH and vascular hypertrophy development, the role of angiotensin II AT1 receptor blockers should also be assessed in this indication.

Thrombolysis of mobile right atrial thrombi following severe pulmonary embolism.

Thrombolysis may favorably affect the clinical outcome of mobile right atrial thrombus following pulmonary embolism (PE). We report the case of three patients with mobile right atrial thrombus following PE, in whom fibrinolysis was performed. Atrial mass disappeared on the control echocardiogram, but control ventilation perfusion scan showed new perfusion defects in all patients. Thrombolysis seems successful for the treatment of patients with mobile right atrial thrombus following PE; however, recurrent PE may be induced by fibrinolysis. This may affect the benefit of such therapy and should be taken into account when using this therapeutic treatment.

Chloroquine cardiomyopathy with conduction disorders.

A 58 year old woman on long term treatment with chloroquine for systemic lupus erythematosus presented with cardiac conduction disorders and heart failure with hypertrophic cardiomyopathy, which was confirmed by histology to be related to chloroquine toxicity. The heart failure improved on stopping chloroquine treatment.

[Compression of the renal artery by a musculo-tendinous band: an unrecognised cause of renovascular hypertension]. / Compression d'une artère rénale par une bande musculo-tendineuse. Une cause méconnue d'hypertension rénovasculaire.

Stenosis of a renal artery by extrinsic compression is an uncommon cause of renovascular hypertension. In rare cases, this compression is due to the presence of fibres from the diaphragm or the psoas muscle. This aetiology should be considered when renal artery stenosis is observed in a young hypertensive patient without cardiovascular risk factors. Spiral CT scan is particularly useful for studying the relationship between the diaphragm and arterial structures. Once the diagnosis has been made, the treatment is surgical section of the fibrous tissues responsible for the compression.

[The Hypertension Optimal Treatment Study: efficacy and tolerability on the 36th month]. / Etude HOT: efficacité et tolérance à 36 mois.

The international, prospective, randomized HOT study was aimed at determining the influence of a targeted BP reduction on cardiovascular morbidity and mortality. Patients were randomly allocated to 3 DBP targets (< 80, < 85, < 90 mmHg). In addition, the impact of a coprescription of aspirin was studied. The BP target had to be reached within 3 months, according to a well-defined strategy : felodipine 5 mg o.d. as a 1st intention drug, 1, 2 or 3 additional drugs, if necessary, on the following steps. BP measurements were made, using an oscillometric automatic device (Hestia). From April 1992 to October 1994, 18,790 patients with an age range 50-80 years, coming from 26 countries, entered the study. The data collected on the 36th month were in agreement with those obtained on the 12th and the 24th months. Baseline DBP was reduced by 21, 23 and 25 mmHg in the 90, 85 and 80 mmHg target groups, respectively. The rate of patients whose DBP reached the target, obviously increased from the 3rd to the 12th month: from 43 to 56%, 60 to 70%, 74 to 83% in the 90, 85 and 80 mmHg, target groups, respectively. From the 2nd to the 3rd year, BP control was further improved, with a slightly higher rate of controlled patients in the elderly (age > 60 y), especially in the 80 mmHg target group. From inclusion to the 3rd month, one-drug treated patients decreased, whereas 2- or 3-drug treated patients increased. Felodipine-treated patients decreased on the 36th month, but remained over 80%. From the 6th to the 36th month, additional prescription of a betablocker or an ACE-inhibitor increased from 36 to 39%, and from 23 to 28%, respectively; moreover, the side-effects rate decreased from 10.5 to 3.6%, with a special decline in ankle edema from 4 to 1%. In conclusion, the BP reduction observed on the 36th month was of the same extent as that observed in the first months. It seems obviously possible to reach a targeted DBP and to maintain it over time, along with a good acceptability of the treatment. Targeted DBP could be more easily achieved in elderly patients, possibly due to a better drug compliance.