Related Questions

What is the physiology that explains how a high heart rate influences coronary artery perfusion and myocardial oxygen delivery?

Circular question. By itself, a high heart rate will result in higher oxygen demand and utilization, but delivery should also increase to compensate. So everything should balance if the heart is healthy. If the heart isn't healthy to begin with a high heart rate is not desirable. Read more...

How could a high heart rate influence coronary artery perfusion and myocardial oxygen delivery?

Decrease. In coronary perfusion pressure due to shortened diastole. Oxygen demand is increased but perfusion may not keep up if there is narrowing of coronary artery. Read more...

Will a cardiac mri/mra show congested heart failure, blocked arteries, etc? What all will it show?

Cardiac MRA/MRI. Yes it will show the blood vessels and show the blockage but if seen on mra the blckage, you will still need angiography for angioplasty or stent placement.It is not a good test for congestive heart failure.You need echocardiogram for that. Read more...
Maybe. Chestive heart failure best diagnosed with plain chest xray and physical examination. To see "blocked coronary arteries" need sither heart catheterization, or ct angiography, because of ability to see fine detail., speak with your cardiologist to determine which is best for you. Read more...
It Varies. Cardiac MRI will show heart function, valves, and if they give contrast, can show evidence of prior heart attacks. Sometimes it can show blocked arteries, but it's not the best study to look at these. Read more...
Cardiac MRI. This study is used to look for specific problems. It can show the heart muscle, heart arteries and adjacent great vessels, it can give an indication of function and status of the muscle and valves. Other tests are complementary and your doctor will generally choose what is best to gather the information needed for decision making. Read more...

If adenosine help to treat heart issues, why was it used to "stress" my heart during cardiac MRA?

Different doses. Adenosine dilates blood vessels (which is the basis of its use for stress testing - it can show a "steal" away from a blocked artery) and it slows conduction thru the AV node (the basis of terminating certain arrhythmias). Beyond those 2 uses, it doesn't otherwise "treat heart issues". Read more...

Best non invasive test to check coronary arteries? Ct angio, stress echo and cardiac MRI MRA? Any better non invasive testing to check coronary art?

Tests. Each of the tests listed has specific strengths and weaknesses. The choice of study depends on the specific information desired by the ordering physician and the capabilities of the performing laboratory. CT angio in many cases will produce the best images of the arteries of the three, MRA has its specific indications and stress echo doesn't show the vessels but shows the effects of serious ischem. Read more...