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23 Q&A related to Arrhythmias

High troponin usually points to heart damage | Cardiology | 12-2010
Cardiac troponins are the most sensitive and specific biochemical markers of myocardial damage. Cardiac troponin is routinely measured in patients presenting with acute chest pain syndrome, acute dyspnea, or other ...

Digoxin dosing | Cardiology | 04-2010
The indications for digoxin in the elderly include the treatment of systolic heart failure when diuretics, ACE inhibitors and beta blockers are insufficient and sometimes to help with rate control ...

CPAP for a nap? | Respirology | 11-2008
Yes, they should, as the reason for using CPAP is to prevent hypoxia during sleep any sleep. Hypoxia can lead to significant adverse effects such as pulmonary hypertension, arrhythmias, erythrocytosis, ...

Which meds preclude blood donation? | Hematology | 07-2008
The list is extensive -- because some may harm the recipient and others the donor. Before accepting a donation, Canadian Blood Services first asks the person a number of questions ...

Should cough CPR be taught to patients? | Cardiology | 02-2008
So-called cough CPR is a technique to maintain blood flow in periods of brief arrhythmia. The individual in distress is told to take deep breaths and cough alternately. The idea ...

Amiodarone: looking out for the thyroid | Cardiology | 09-2006
Antiarrhythmic agents such as amiodarone are being used less frequently, but they're still important agents for many patients in particular, to prevent atrial fibrillation and serious arrhythmias in those who ...

What's a safe level of nicotine? | Psychiatry | 04-2006
There's no safe level of nicotine absorbed through cigarette smoking, though smoking a cigarette every few days is unlikely to be problematic. Common sense should guide you in counselling patients. ...

When should patients forego flying? | Cardiology | 03-2006
Air travel poses stressors on a patient, from the general such as moving through crowded airports, to the specific related to aircraft environment. Most importantly, flight entails reduced barometric pressure, ...

Who's at risk for SSRI-prolonged QT? | Clinical Pharmacology | 01-2006
Prolongation of the QT interval is an undesired effect of many medications, and in the context of a patient with congenital prolongation of the QT interval, can lead to life-threatening ...

What if TSH increases with amiodarone? | Endocrinology | 02-2005
If the patient is clearly hypothyroid or if TSH is persistently elevated despite normal free T amp lt sub amp gt 4 amp lt sub amp gt levels, I would ...

Are benzodiazepines safe with CPAP? | Respirology | 12-2004
The best treatment for sleep apnea -- a disorder that can lead to an increased incidence of sudden death, arrhythmias, hypertension, etc. -- is the CPAP mask. It often takes ...

Safe Tx for ingrown toenails | Dermatology | 08-2004
Ingrown nails are common and painful. Frequently, surgery is required to remove the part of the nail plate that's damaging the lateral nail fold. The most common method is to ...

Tweaking levothyroxine when TSH is very low | Endocrinology | 09-2003
I'd lower the dose to target the TSH into the normal range. If the patient only feels well when the TSH is suppressed, I'd ensure the free T3 is maintained ...

The rise and fall of IV Mg for acute MI | Cardiology | 04-2003
Magnesium was once widely utilized by physicians in acute MI, but not anymore. Past research included a meta-analysis of 12 small, randomized, controlled trials, which demonstrated a benefit with reduction ...

The right starting dose for thyroxine | Endocrinology | 01-2003
Replacement is in the order of 1.6 ug kg, so the average adult needs 75-100 ug daily. That's a reasonable starting dose for many patients, though I'd cut it down ...

THE AGONY OF ECSTASY | Psychiatry | 06-2001
Ecstasy 3-4 methylenedioxymethamphetamine, or MDMA has been falsely labelled as a drug that has few negative side effects. Unfortunately, this just isn't so. Immediate effects can include hyperthermia, hyponatremia, seizures, ...

GUIDING GPs THROUGH AMIODARONE | Cardiology | 05-2001
Amiodarone has been used for managing both supra and ventricular dysrhythmias, such as atrial fibrillation, serious life-threatening arrhythmias and ventricular tachycardia fibrillation. Toxicities are related to dose and duration of ...

CLOZAPINE AND CARDIAC PROBLEMS | Psychiatry | 10-2000
We know that clozapine can cause sustained tachycardia in about 25 of patients. This tachycardia isn't just a reflex response to orthostatic hypotension, but may actually be due to the ...

SHOULD SUBCLINICAL HYPOTHYROIDISM BE TREATED? | Cardiology | 04-1999
Our cardiologist responds The atrial fibrillation is probably unrelated to the thyroid status. About 10 of patients over the age of 70 have atrial fibrillation, which can be caused by ...

SHOULD SUBCLINICAL HYPOTHYROIDISM BE TREATED? | Endocrinology | 04-1999
Our endocrinologist responds If the TSH remains elevated, I'd start thyroid hormone replacement as soon as his atrial fibrillation is well controlled. In elderly patients, especially if they have arrhythmias ...

ANTIDEPRESSANTS DEPRESS CISAPRIDE BREAKDOWN | Psychiatry | 04-1999
The antidepressants fluvoxamine, fluoxetine and nefazodone can all inhibit cisapride metabolism. This can cause increased levels of cisapride in the blood, which could lead to cardiovascular side effects, including serious ...

HOW TO DEAL WITH CARDIAC SIDE EFFECTS OF TCAS | Psychiatry | 05-1997
In normal therapeutic doses, TCAs don't tend to cause cardiac complications, even in patients with pre-existing heart disease. In larger doses they can cause conduction delays, arrhythmias, asystole, myocardial damage, ...

NO TO DIURETICS IN ELDERLY | Urology | 02-1995
While it is well known that both thiazide and loop diuretics can increase urinary magnesium excretion, the exact incidence of diuretic-induced hypomagnesemia is not known as there have been no ...



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