February 11th 2025
Your daily dose of the clinical news you may have missed.
Evaluating hypoxemia in the critically ill
May 1st 2005Abstract: Prompt correction of hypoxemia is a basic goal in the treatment of critically ill patients. Improvements in global oxygen delivery may be achieved by several means, such as providing an adequate fraction of inspired oxygen and using packed red blood cell transfusions for volume resuscitation. Low levels of positive end-expiratory pressure often help improve arterial oxygen tension. Measurement of mixed venous oxygen saturation (Sv?248-175?O2) can be useful in patient assessment. Sv?248-175?O2 may be decreased in patients with hypoxemia, hypovolemia, or anemia and may be elevated in patients with sepsis. Serum lactate levels may not quantitate the degree of tissue hypoxia, but serial measurements can help monitor the patient's response to therapy. For patients with septic or hypovolemic shock, early fluid resuscitation with isotonic crystalloid solution is essential. Catecholamine vasopressors can be useful when fluid administration fails to restore adequate blood pressure. (J Respir Dis. 2005;26(5):209-219)
Statins: A Treatment Option for Renal Disease?
April 15th 2005Is there a role for statins in the treatment of chronic progressive renal disease?Inflammation is a component of the pathophysiology of progressive renal disease and may also be associated with other major modifiable risk factors, such as atherosclerosis, hypertension, and diabetes mellitus.
Clinical Citations: Antihypertensive therapy and COPD: The effect of ß-blockers on mortality
April 1st 2005Cardiovascular disease is a leading cause of death in patients with chronic obstructive pulmonary disease (COPD). While some physicians may be reluctant to prescribe ß-blockers for these patients, because of concern about adverse effects on lung function, a study conducted by Au and associates indicates that ß-blockers may have an edge over other antihypertensive agents in reducing mortality risk.
Rectal Prolapse in an Elderly Woman
April 1st 2005An 83-year-old woman with a history of mild dementia and hypertension presented with rectal bleeding. Her husband stated that she had "hemorrhoids." Her current medications included donepezil, ramipril, and docusate sodium. Earlier in the year, a colonoscopy had revealed diverticulosis.
High LDL and HDL: Is Drug Therapy Required?
April 1st 2005My patient is a 52-year-old woman with elevated levels of both low-density lipoprotein (LDL) and high-density lipoprotein (HDL) cholesterol. She does not have a family history of cardiovascular disease; has never smoked; is of normal weight; and does not have diabetes, hypertension, or known atherosclerotic disease.
Paraesophageal Hernia in an Elderly Man
March 2nd 2005For 2 years, a 79-year-old man had postprandial fullness and epigastric discomfort. He also experienced regurgitation and substernal pain after eating that was relieved by belching. He had a history of hypertension and gout. The patient’s vital signs were normal. Laboratory test results were within normal limits.
Paraesophageal Hernia: A Finding of Advanced Age
March 1st 2005For 2 years, a 79-year-old man had postprandial fullness and epigastric discomfort. He also experienced regurgitation and substernal pain after eating that was relieved by belching. He had a history of hypertension and gout. The patient’s vital signs were normal.
Pituitary Macroadenoma in a 77-Year-Old Man
January 1st 2005During a workup for dementia, a 77-year-old man was found to have a pituitary macroadenoma (21 x 17 x 25 mm) with suprasellar extension on a coronal-section MRI scan. The patient had hypertension and mild erectile dysfunction. He denied headaches, nausea, vision problems, weight changes, weakness, and polyuria. His medications included nifedipine, hydrochlorothiazide, and aspirin.
Over-the-Counter Ibuprofen: A Reversible Cause of Hypertension and Headache
December 1st 2004The patient is a 47-year-old man who began to experiencefrequent headaches about 6 years before hepresented to a neurology clinic. The headaches rapidly progressedto become daily and almost constant. He describeda sensation of dull pressure in both temples that was presenton or within a few hours of awakening and that persistedfor the remainder of the day. He experienced a moreintense, disabling, throbbing pain in the same locationonce or twice a week, with photophobia and nausea, thatmight last 2 to 3 days. The patient took 2 to 6 over-thecounter(OTC) analgesic tablets each day-usually200 mg of ibuprofen. These would dull but not terminatethe pain.
Complications of Diabetes Mellitus: Right-Sided Endocarditis in a Diabetic Patient
November 2nd 2004High-grade fever, chills, fatigue, malaise, and anorexia developed in a 35-year-old man following subclavian catheterization because of chronic renal failure of unknown cause. The patient, who had long-standing diabetes mellitus, was admitted to the ICU with the diagnosis of possible sepsis. The next day, he was found to have a grade 2/6 systolic murmur compatible with tricuspid regurgitation. This was confirmed when a 4-chamber echocardiogram (A) revealed a large single piece of vegetation (2 arrows) lying on the tricuspid valve, flapping in and out of the right ventricle. In a 2-dimensional echocardiogram of the right atrium and right ventricle (B), 3 arrows point to the vegetation. (RV, right ventricle; LV, left ventricle; RA, right atrium; LA, left atrium; TV, tricuspid valve.)
Urinary Tract Infections in Elderly Patients:How Best to Diagnose and Treat
October 2nd 2004An 83-year-old woman is brought by her daughter for evaluation becauseof increasing confusion during the past few days. The patienthas early Alzheimer dementia, hypertension, and type 2 diabetes. She takes donepezil, 10 mg/d;lisinopril, 5 mg/d; and glipizide, 5 mg bid. She is unable to bathe and dress herself as well as previously,has been crying for no apparent reason, and has lost her appetite.
Erectile Dysfunction in Patients With Hypertension:
October 1st 2004ABSTRACT: The prevalence of erectile dysfunction (ED) is higher among men with hypertension than among normotensive men. Sexual dysfunction is a common side effect of many antihypertensive medications and can lead to noncompliance. Treatment-related ED is more often associated with diuretics and ß-blockers and is less common with angiotensin-converting enzyme inhibitors and angiotensin receptor blockers. If ED complicates therapy, consider switching to an antihypertensive agent with fewer sexual side effects. However, if compelling reasons exist for the use of a particular antihypertensive agent (eg, a ß-blocker in a patient with previous myocardial infarction), several options for the treatment of ED are available. Phosphodiesterase-5 inhibitors have been shown to be safe and effective in men who are receiving antihypertensive therapy.
Diabetic Neuropathy: Early Clues, Effective Management
October 1st 2004ABSTRACT: The early signs of diabetic neuropathy can be detected during a routine clinical examination. Inspect patients' feet for deformities and sensory loss, which indicate risk of ulceration. Prolonged poor glycemic control, alcohol abuse, and obesity increase the risk of amputation. Autonomic dysfunction, which can lead to sexual dysfunction and gastropathy, can be detected by measurement of heart rate and blood pressure. A resting heart rate of about 100 beats per minute and a decrease of about 30 mm Hg in systolic blood pressure within 2 minutes of standing are abnormal findings. Electromyography and nerve conduction studies confirm the diagnosis. Improved metabolic control is the main goal of treatment. Analgesics, neuromodulators, and tricyclic antidepressants are effective for managing pain. In patients with autonomic neuropathy, treat the associated symptoms.
Posterior Shoulder Dislocation
September 1st 2004A 53-year-old man with type 2 diabetes mellitus and hypertension presented to the emergency department with pain in his left upper chest and back, neck, and shoulder. The pain increased with passive and active range of motion testing and decreased at rest. His physical examination was unremarkable except for restricted left shoulder movement and generalized tenderness in the left shoulder area.
Congestive Heart Failure Update: New Cardiac Peptides in Diagnosis and Treatment
September 1st 2004ABSTRACT: The Studies of Left Ventricular Dysfunction (SOLVD) trials demonstrated that early intervention in congestive heart failure (CHF) improves survival. However, early CHF is mainly a clinical diagnosis based on New York Heart Association criteria and, until recently, no easy and inexpensive screening test existed. There are now several such tests that employ radioimmunoassays (RIAs) to measure cardiac peptides in a single plasma sample; results help determine the likelihood that CHF is present but do not definitively establish the diagnosis. The vessel dilator RIA is the most specific and sensitive for differentiating persons with mild CHF from healthy ones; intravenous administration of this cardiac peptide hormone has beneficial hemodynamic, diuretic, and natriuretic properties in persons who have CHF. Brain natriuretic peptide (BNP) measured by fluorescence immunoassay is useful in the emergency department, because a result may be obtained in as little as 15 minutes. This assay may indicate CHF; further tests are recommended to define the diagnosis. BNP increases with other causes of dyspnea, including pulmonary hypertension, pulmonary emboli, and renal failure, so it is not specific for CHF. BNP also increases with age, and measured values are higher in women than in men.
Autosomal Dominant Polycystic Kidney Disease in a 30-Year-Old Man
August 2nd 2004A 30-year-old man presentedwith severe left flankpain radiating to his abdomenand gross hematuriaof 5 to 10 days’ duration.He also reported a 4- to 6-monthhistory of nausea with intermittentvomiting, anorexia, and progressiveweight loss. He took no medicationsand had no allergies.
ECG Challenge: Nausea and Weakness in a Woman With Multiple Diseases
August 1st 2004A 60-year-old woman with hypertension, diabetes mellitus, and intermittentatrial fibrillation presents with nausea, diaphoresis, dizziness, and globalweakness that has lasted 1 hour. She denies chest pain, dyspnea, syncope,vomiting, diarrhea, blood loss, and headache; there is no vertigo. Medicationsinclude acetaminophen, digoxin, diltiazem, glipizide, hydrochlorothiazide,irbesartan, metformin, pioglitazone, and warfarin.
Whats Wrong With This Picture?: Middle-aged Woman With Chest Pain and Dyspnea
July 1st 2004A 48-year-old woman with a historyof hypertension and mildasthma has been transferred to themedical service because of an abnormalpostoperative ECG. She hadbeen admitted 2 weeks earlier to thegynecology-oncology service for localrecurrence of a previously resecteduterine sarcoma and underwent laparotomyfor debulking of the pelvicmass and resection of the rectosigmoidcolon. She did well until postoperativeday 14, when sudden chestpain and dyspnea developed.
Secondary Prevention in Patients With Unstable Angina and Non-ST-Segment Elevation MI:
July 1st 2004ABSTRACT: Guidelines for the management of patients with unstable angina and non-ST-segment elevation myocardial infarction have been updated following results from pivotal controlled trials. The new American College of Cardiology/American Heart Association guidelines stress risk factor modification and long-term management. Medications that have been shown to reduce the incidence of future cardiovascular events in patients with acute coronary syndromes include antiplatelet agents, statins, ß-blockers, and angiotensin-converting enzyme inhibitors. Other long-term management strategies include smoking cessation, achievement and maintenance of optimal weight, daily exercise, appropriate diet, and control of hypertension and diabetes.
Hypertension Q&A: When Is an urgency not an emergency
June 1st 2004Hypertensive crises encompass a spectrum of clinical situations thathave in common elevated blood pressure (BP) and progressive or impendingtarget organ damage. Each year more than 500,000 Americans (about1% of all persons with hypertension in the United States) have a hypertensivecrisis. In large urban areas, 25% of visits to the medical section of any givenemergency department (ED) are attributable to a hypertensive crisis.