tag:blogger.com,1999:blog-8005913307053669259.post1588757993416027992..comments2024-03-10T03:33:29.698-04:00Comments on Medicowesome: Why does heart stop in diastole when plasma potassium level rises?IkaN (Nakeya Dewaswala, M.D.)http://www.blogger.com/profile/03461017124502223040noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-8005913307053669259.post-51450496321550963022019-11-08T01:16:44.841-05:002019-11-08T01:16:44.841-05:00I too didnt understand what it means , i looked at...I too didnt understand what it means , i looked at the AP of cardiac muscle if that is the graph u r referrring to and still didnt get it Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8005913307053669259.post-82524830451930128062018-02-07T06:00:19.939-05:002018-02-07T06:00:19.939-05:00I’m confuse . If you say it can’t repolaized then ...I’m confuse . If you say it can’t repolaized then it’s must be contraction phase ( systole ).<br />Anonymoushttps://www.blogger.com/profile/08616834830400812434noreply@blogger.comtag:blogger.com,1999:blog-8005913307053669259.post-11654646690294769532016-11-15T08:05:36.493-05:002016-11-15T08:05:36.493-05:00Look at the graph, you'll get it!Look at the graph, you'll get it! IkaN (Nakeya Dewaswala, M.D.)https://www.blogger.com/profile/03461017124502223040noreply@blogger.comtag:blogger.com,1999:blog-8005913307053669259.post-43962453888938747062016-11-13T11:34:37.275-05:002016-11-13T11:34:37.275-05:00Excuse me, can you explain me further why "wi...Excuse me, can you explain me further why "without this negative resting potential, cardiac cells cannot repolarized"? Thanks ^^Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8005913307053669259.post-54528249749350323022015-11-25T23:30:57.134-05:002015-11-25T23:30:57.134-05:00I am sorry, I used confusing terminologies.
If th...I am sorry, I used confusing terminologies.<br /><br />If the membrane potential went from -30 to -20 because of potassium moving into the cell, it became less negative (More towards zero, or more positive).<br /><br />IkaN (Nakeya Dewaswala, M.D.)https://www.blogger.com/profile/03461017124502223040noreply@blogger.comtag:blogger.com,1999:blog-8005913307053669259.post-48715965876958889712015-11-25T01:50:21.410-05:002015-11-25T01:50:21.410-05:00You say the concentration gradient becomes lower, ...You say the concentration gradient becomes lower, inhibiting the ability to repolarize, this makes sense. Then you say the membrane potential gets lower, less negative, this makes no sense. If the concentration gradient is ruined because of extracellular potassium, the extracellular space have become even more positive and the membrane potential is wider, hence more negative? yes? no? Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8005913307053669259.post-53138096088746648952015-01-26T06:09:28.037-05:002015-01-26T06:09:28.037-05:00Hello!
You don't wanna give rapid infusion o...Hello! <br /><br />You don't wanna give rapid infusion of potassium because it can cause hyperkalemia which can lead to a number of adverse effects. The most important is the effect of potassium on the heart - cardiac arrhythmias, heart block and even cardiac arrest. <br /><br />Potassium is lethal and therefore, a slow infusion with ECG monitoring is preferred. IkaN (Nakeya Dewaswala, M.D.)https://www.blogger.com/profile/03461017124502223040noreply@blogger.comtag:blogger.com,1999:blog-8005913307053669259.post-32464970409973019742015-01-15T13:20:10.240-05:002015-01-15T13:20:10.240-05:00I am a nursing instructor. In order for me to tea...I am a nursing instructor. In order for me to teach I like to understand it myself down to the cellular level. It bugs me that in the text book it will say 'do not give potassium IV push'.....why? I want to know why? What happens? What does it do? So I appreciate this new forum I have found. Thanks!Anonymousnoreply@blogger.com