Serbia and Bosnia were never part of Soviet Union; they were Yugoslav federal states. Soviet Union had no authority over government services or documents issued in Yugoslavia.
Pacemaker is a medical device that maintains an adequate heart rate and is primarily used in the treatment of bradycardia (low heart rate). Symptoms of bradycardia include: fainting, shortness of breath, chest pain, confusion, dizziness. Life with this condition is very challenging, especially for an older man that takes care of two young children. Recovery from this operation is not all that fast or easy, it can take months for patient to be able to return to normal life, and help from family members is very important. The only way for Dr. Brennan not to notice that her father has heart problems serious enough that "significant procedure" is needed, is that she did not see or hear from him in a long time. Since Max is taking care of her children, this is hardly possible.
When Dr. Brennan and Angela discuss general Radic son, Mark, there is a text on the screen (19:42). Name on the screen is misspelled. Also, it should be written in Serbian Cyrillic, but it is not.
Yugoslav names are mispronounced throughout the episode. When Booth mentions the warlord he killed by name he mispronounces the name Radic. All Yugoslav names ending with "ic" are pronounced "ich". A person with as much military experience as Booth would know that, especially considering the importance of the person he killed. Later on in the episode Javor also mispronounces his name and the name Kovac. No-one of Yugoslav origins would mispronounce names like that, no matter how long they've lived abroad. Brennan also mispronounces the names, even though she would definitely be aware of the subtlety of pronunciation of another language, as she's demonstrated previously. Another character that says he's extremely proud of his Serbian heritage also mispronounces the name.
Serbian passport of Javor Nicovic seen on 15:17 was issued in 1995. Official name of Serbia at the time was Federal Republic of Yugoslavia. The type of passport shown was issued in 2008.