Basically right sided heart failure (HF) is when the right side of your heart isn't pumping as efficiently as it should be...there are many reasons for right sided heart failure.
Left sided heart failure can actually cause the right side of your heart to overwork and result in right sided HF, some heart valve problems may lead to this as well.
Some symptoms of RHF are; shortness of breath, swelling of feet and ankles, urinating more frequently at night, pronounced neck veins, palpitations, (sensation of feeling the heart beat), irregular fast heartbeat, fatigue, weakness and faintness.
For more information, please see the link below...
http://www.merck.com/mmhe/sec03/ch025/ch025a.html?qt=Right%20sided%20heart%20failure&alt=sh
http://www.emedicine.com/radio/topic189.htm