Pacemaker cells potassium
Common Questions and Answers about Pacemaker cells potassium
pacemaker
Potassium is a chemical element and it is part of the electrolyte that should be in balance with other lytes to adequately conduct an electrical impulse that originates with the sinus node in the right atrium. The mechanism of action is not completely understood, but what is when a voltage (unit of potential for conduction) and electrolyte there will conduction and passage of electrical impluses.
My brother has had a pacemaker/debrillator for years. In the last 2 years we have nearly lost him 9 times due to low potassium. The diagnosis has been "low potassium" as the cause for his heart stopping which requires the defbrillator to shock him and bring him back. He has been rushed to the ER and had lengthy hospital stays each time. He is WORN OUT.
Is there any kind of home test to check potassium levels for heart patients? Or a home test for electrolytes?
The spread of electricity throughout the heart muscle is possible because all heart muscle cells, not just pacemaker cells, are excitable. Usually, the heart muscle cells keep time more slowly than normal pacemaker cells. This allows the pacemaker cells within the SA node to be in control of generating and pacing the heartbeat.
You have suffered a great injustice, and I'm sorry for your experience. I do not know what the black substance was, or what the results of exposure may be. However, the skipped beats may be caused simply by confusion in the heart muscle itself.
Your heart cells are all capable of contracting and causing the heart to beat. Usually, this job is segregated to specific cells that most people refer to as the "natrual pacemaker.
his can go over 200 and down to 58 with out any issues (scares me as he might stroke out) a few weeks ago he went from 110 (normal down to 48 and passed out. he just bought himself a pacemaker his cardiologist said. he did wear a holter monitor also for 24 hours. it showed a hr of 48 while he was a sleep, DR wasn't concerned. and the highest was 174 at rest.
Hi, am doing some research. please can you explain why an 89yr old with pacemaker kept her 70bpm pulse with a fever of 40 deg.C. Also what were the metabolic implications for her? Many thanks.
My brother has had a pacemaker/debrillator for years. In the last 2 years we have nearly lost him 9 times due to low potassium. The diagnosis has been "low potassium" as the cause for his heart stopping which requires the defbrillator to shock him and bring him back. He has been rushed to the ER and had lengthy hospital stays each time. He is WORN OUT.
Is there any kind of home test to check potassium levels for heart patients? Or a home test for electrolytes?
I had a pacemaker put in 1979 after my daughter was born in 2004 they took it out now it is 2008 a ekg showed I have abnormal t waves could it be because I do not have a pacemaker anymore
Potassium is indeed extremely important when it comes to 'excitable' cells, as heart cells are. In a (simplified) nutshell, the cells of our body have a membrane around them that controls what goes in and what comes out. To have a 'calm' cell, you want a relatively high concentration of potassium on the inside, compared to sodium on the outside.
Medications like fluconazole block potassium channels. In susceptible people, this can prolong the QT interval on the EKG and lead to ventricular tachycardia called torsade de points. There is a whole list of medications that can have similar effects:
http://long-qt-syndrome.com/lqts_drugs.html
http://www.americanheart.org/presenter.jhtml?identifier=993
This is a relatively rare condition. Defibrillator discharges usually have nothing to due with QT intervals or medications.
I started having arrythimias according to a pacemaker check. Could this medication cause all of this to happen. Plus a paid mgmt dr put me on a strong muscle relaxer years before this and my heart beat dropped to 40 beats and this caused me to have the pacemaker. I sleep walk a lot and sometimes find some of my meds are gone and this occasion sev muscle relaxers weren't in the bottle. I might be in denial and just have heart failure.
Hi,
I have Sinus Tachycardia. Last episode 216 bpm for almost an hour. On Verahexal 240 SR
Doctor mentioned removing my AV Node and placing a pace maker in. I have an AV block Mobitz II. How dangerous is this? MRI revealed Microvascular Ischemia. Is my tachycardia the cause of the microvascular ischemia?
History of anorexia over nearly 22 years. Doctors reckon anorexia is the cause of the damage to my heart.
Ironically, I am going to ask. Should I be taking magnesium?
The spread of electricity throughout the heart muscle is possible because all heart muscle cells, not just pacemaker cells, are excitable. Usually, the heart muscle cells keep time more slowly than normal pacemaker cells. This allows the pacemaker cells within the SA node to be in control of generating and pacing the heartbeat.
By the way...I noticed the ??? near the "natural pacemaker" portion of your post. Thought I'd take a minute to help you understand.
The sinus atrial node is a clump of cells in your heart that put out an electrical current that causes the rest of your cells in the atrial center of your heart to contract. The electrical current continues into the ventricular node and causes the bottom of the heart to contract immediately after that.
DR WANTS TO DO A PACEMAKER. RESEARCH SHOWS SOME ASYSTOLE IN MOST PEOPLE IS OK. HOW MANY SECONDS OF ASYSTOLE IS SIGNIFICANT ENOUGH TO WARRANT A PM? THE 1ST EPISODE WAS ABOUT 5 SECONDS WHEN I ASKED THE LAST TIMES HOW LONG THEY WERE I WAS TOLD "LONG" I WAS FREAKED OUT SO I DIDNT ASK AGAIN. BOYFRIEND WILL GO WITH ME NEXT TIME. DONT WANT A PM UNLESS ABSOLUTLY NECESSARY. WHEN THEY IMPLANTED LOOP MONITOR THEY GAVE ME MRSA SO IM PRONE TO GETTING IT AGAIN.
Yes, the condition can infect the heart's natural pacemaker. The heart's "natural" pacemaker is called the sinoatrial (SA) node or sinus node. It's a small mass of specialized cells in the top of the heart's right atrium (upper chamber). It makes the electrical impulses that cause your heart to beat.
If the cells are dead, a cath would not be of any help. If the cells are hibernating due to low blood flow to the area, medication can increase the blood flow to the area....angina with stress and rest normal blood flow.
Your symptoms, if any, would be the issue to correct. If you are having chest pain (angina) with exertion and rest relieves the chest pain that would be stable angina and medication can be effective.
Too much insulin secretion can cause hypokalemia because insulin promotes potassium to enter skeletal muscle cells. Be aware that adrenal tumors, congestive heart failure and hypertension predispose a person to hypokalemia because renal potassium stores can be depleted by these conditions. You may want a doctor to rule out those condition....a diuretic is not the only cause. Your medication may be over ridden by a medical condition...that may be a consideration you may want assessed.
what really is cardiac action potential and how does it work with potassium to lower the heart rate?
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