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Heart Disease (Expert Forum)
High cardiac output
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High cardiac output
by Lyn2, Aug 28, 2001 12:00AM
I recently wrote asking about high CO and its relation to heart failure. Thankyou for your insight. I am sorry to be persistent, but I am tired of feeling like an anomaly to my doctors, and want to put this puzzle together. So more questions.
You mentioned causes of high CO. I do not have any of those (except sm. PFO) Every dr. who has ever seen me has checked my thyroid (normal). I had my sinus node ablated after several yrs. of rate 120-140bpm. Sleeping- not below 100. I eat alot, and remain underweight. I have NEVER taken street drugs, or diet pills. Since my ablation I have wide complex tach, a-flutter, atrial tach.
Question:
Is it possible that my CO was high back when I had sinus tach, like it is now? Do you think it is likely that the same mechanism is still driving my heart, even though the rate is falsely blunted from the sinus node ablation?
Question:
Other there any causes of hypermetabolism other than hyperthyroid?
Question:
How would you interpret these results from heart cath. (CO 16L/min, index 11/L/min/m2, SVR 415dynes/sec-5? Can this be interpreted as normal?
I have been classified as NYHA type class 2.
Question:
Does this sound like a progressive situation? My doc. is afraid to do an av node ablation for fear of decompensation. Does this make sense in light of all this?
I feel like we deal with all these separate problems with meds. unable to address the problem as a whole. I just feel like I want to know what is around the corner, no matter what that is.
Thankyou AGAIN!!!!
You mentioned causes of high CO. I do not have any of those (except sm. PFO) Every dr. who has ever seen me has checked my thyroid (normal). I had my sinus node ablated after several yrs. of rate 120-140bpm. Sleeping- not below 100. I eat alot, and remain underweight. I have NEVER taken street drugs, or diet pills. Since my ablation I have wide complex tach, a-flutter, atrial tach.
Question:
Is it possible that my CO was high back when I had sinus tach, like it is now? Do you think it is likely that the same mechanism is still driving my heart, even though the rate is falsely blunted from the sinus node ablation?
Question:
Other there any causes of hypermetabolism other than hyperthyroid?
Question:
How would you interpret these results from heart cath. (CO 16L/min, index 11/L/min/m2, SVR 415dynes/sec-5? Can this be interpreted as normal?
I have been classified as NYHA type class 2.
Question:
Does this sound like a progressive situation? My doc. is afraid to do an av node ablation for fear of decompensation. Does this make sense in light of all this?
I feel like we deal with all these separate problems with meds. unable to address the problem as a whole. I just feel like I want to know what is around the corner, no matter what that is.
Thankyou AGAIN!!!!
Doctor's Answer
by CCF-M.D.-CRC, Aug 29, 2001 12:00AM
Dear cn,
Question:
Is it possible that my CO was high back when I had sinus tach, like it is now? Do you think it is likely that the same mechanism is still driving my heart, even though the rate is falsely blunted from the sinus node ablation?
A: Hard to say without having measured the cardiac output during the tach. I suppose one could pace the heart at that rate and then measure the C.O. but I'm not sure what this would prove.
Question:
Other there any causes of hypermetabolism other than hyperthyroid?
A: I suppose there may be some rare causes. An endocrinologist could better answer your question.
Question:
How would you interpret these results from heart cath. (CO 16L/min, index 11/L/min/m2, SVR 415dynes/sec-5? Can this be interpreted as normal?
A: This is a high cardiac output and it would not be typical for the resting state.
I have been classified as NYHA type class 2.
Question:
Does this sound like a progressive situation? My doc. is afraid to do an av node ablation for fear of decompensation. Does this make sense in light of all this?
A: I think the cause of the high cardiac output must first be found. The prognosis and treatment would depend on this. Your doctors need to make sure that all of the possible common causes have been excluded. If they can still find no obvious cause you should seek a second opinion at a large clinic that has specialists in the area of heart failure. If you would like to be seen in Cleveland I would recommend Dr. Jim Young. He is the head of the section of heart failure. You can make an appointment with him by calling the number below.
Question:
Is it possible that my CO was high back when I had sinus tach, like it is now? Do you think it is likely that the same mechanism is still driving my heart, even though the rate is falsely blunted from the sinus node ablation?
A: Hard to say without having measured the cardiac output during the tach. I suppose one could pace the heart at that rate and then measure the C.O. but I'm not sure what this would prove.
Question:
Other there any causes of hypermetabolism other than hyperthyroid?
A: I suppose there may be some rare causes. An endocrinologist could better answer your question.
Question:
How would you interpret these results from heart cath. (CO 16L/min, index 11/L/min/m2, SVR 415dynes/sec-5? Can this be interpreted as normal?
A: This is a high cardiac output and it would not be typical for the resting state.
I have been classified as NYHA type class 2.
Question:
Does this sound like a progressive situation? My doc. is afraid to do an av node ablation for fear of decompensation. Does this make sense in light of all this?
A: I think the cause of the high cardiac output must first be found. The prognosis and treatment would depend on this. Your doctors need to make sure that all of the possible common causes have been excluded. If they can still find no obvious cause you should seek a second opinion at a large clinic that has specialists in the area of heart failure. If you would like to be seen in Cleveland I would recommend Dr. Jim Young. He is the head of the section of heart failure. You can make an appointment with him by calling the number below.
