Nassir Nassiri - Academia.edu (original) (raw)

Papers by Nassir Nassiri

ARYA Atherosclerosis, 2019

BACKGROUND Coronary artery bypass grafting (CABG) surgery is widely accepted as a revascularizati... more BACKGROUND Coronary artery bypass grafting (CABG) surgery is widely accepted as a revascularization method for coronary artery disease (CAD). Despite survival benefit and improvement in quality of life, CABG may impose major morbidities and significant complications. Right ventricle (RV) dysfunction is an important complication that may affect patient's longevity and functional capacity. The aim of this study was to evaluate the relationship between RV dysfunction and some invisible parameters like inferior vena cava (IVC) size with physical capacity. METHODS In this prospective study, 61 eligible CABG candidates were enrolled and RV function was assessed by echocardiographic parameters before CABG and one week and six months after the procedure, using tricuspid annular plane systolic excursion (TAPSE), Tei Index (TI), peak systolic movement (Sm) (cm/s), and IVC size. Functional capacity was assessed by six-minute walk test (6-MWT) 6 months after CABG. RESULTS 58 patients who di...

Anesthesiology and Pain Medicine, 2017

Background: Postoperative pain is a complex process commonly caused by surgical trauma. It is one... more Background: Postoperative pain is a complex process commonly caused by surgical trauma. It is one of the major concerns of patients undergoing heart surgery. Despite new techniques and modern analgesic treatments, postoperative pain is still one of the most important controversial issues. Methods: 68 patients scheduled for elective CABG with CPB were included in a prospective, double-blind clinical trial. They were randomly divided into two groups. One group received PCA pump including morphine (group P) with underlying infusion of 0.02 mg/kg/Qh, bolus dose of 1 mg, lockout time of 15 minutes, and a maximum of 4 bolus of 0.02 mg/kg for one hour and the other group received morphine bolus (group B). Three patients were excluded from the study, and 33 and 32 patients participated in the groups P and B, respectively. Variables including age, gender, pump time, aortic clamp time, duration of surgery, complications (nausea and vomiting, GI Bleeding, and hypoxia), level of pain based on VAS, opioid consumption, hemodynamic, and sedation status were measured in both groups. Results: There was no significant difference between the groups regarding age, gender, pump time, clamp time, duration of surgery, complication, sedation score, and hemodynamic status in most of the assessment periods. By assessing the pain severity in the groups at different periods, results showed a significant difference between the groups except at enrollment, and a lower severity of pain was noted in the group P compared to the group B. The consumed opioid was significantly higher in the group P than in the group B. However, higher doses of diclofenac and paracetamol were administered in the group B compared to the group P. Conclusions: Results showed that higher morphine would be used in patients with PCA pump after extubation following heart surgery, and this increased dose of opioid was associated with better pain control and lack of complication. Therefore, PCA pump with underlying infusion could be effectively used in patients undergoing CABG that are directly assessed in intensive care unite.

Anesthesiology and Pain Medicine, 2016

Background: Major surgeries such as open-heart surgery with cardiopulmonary bypass are associated... more Background: Major surgeries such as open-heart surgery with cardiopulmonary bypass are associated with a complexity of stress response leading to post-operative complications. Studies have confirmed that anesthesia can mitigate the surgically induced stress response. Objectives: The aim of this study was to compare the effects of propofol and isoflurane, both supplemented with Sufentanil, on the stress response in coronary artery bypass graft surgery with cardiopulmonary bypass, using cortisol as a biochemical marker. Methods: This double-blind randomized clinical trial was conducted on 72 patients who underwent coronary artery bypass grafting (CABG) with cardiopulmonary bypass meeting the inclusion criteria. The subjects were randomly divided into two groups of isoflurane (n = 36) and propofol (n = 36) both supplemented with sufentanil. Serum cortisol levels were measured and compared between the groups; 30 minutes before the surgery (T0), at the end of the cardiopulmonary bypass (T1), and 24 hours after the surgery (T2). Results: Compared to the baseline (T0), at the end of cardiopulmonary bypass (T1), both groups demonstrated a decrease in plasma cortisol levels with no statistical significant difference (P = 0.4). At T2 measuring time point, the level of plasma cortisol significantly increased in both groups (P = 0.02), however this increase was less in the Isoflurane group. Conclusions: In CABG with cardiopulmonary bypass, using plasma cortisol level as a measure, Isoflurane-Sufentanil significantly reduces the stress response to the surgery, when compared to propofol-Sufentanil.

Iranian Red Crescent Medical Journal, 2016

Background: In patients with coronary artery stenosis, coronary artery bypass graft surgery (CABG... more Background: In patients with coronary artery stenosis, coronary artery bypass graft surgery (CABG) is the most effective strategy to limit infarct size and improving outcomes. However, the rapid restoring of blood flow to the tissue can paradoxically induce cardiac damage. This phenomenon termed as myocardial ischemic/reperfusion (I/R) injury which is exacerbated under cardiopulmonary bypass (CPB) and is the cause of poor clinical outcomes. Therefore, it is essential to search for novel strategies with further cardio protective effects. Objectives: In the current study, we investigated the effects of selenium (Se) administration on I/R injury in CABG patients. Methods: This randomized double-blind clinical trial was conducted in the department of cardiac surgery of a university hospital in North of Iran from May 2015 to September 2015. One hundred and ten patients undergoing an elective isolated CABG surgery were divided into two groups using randomized fixed quadripartite blocks. They received either intravenous Se before induction of anesthesia, or normal saline as placebo. Cardiac troponin I (CTnI) and creatine kinase-MB (CKMB) were measured as biomarkers at four measurement point times, before the intervention (T0), at 6, 12, 24 and 48 hours after the surgery (T1-T4). Results: Finally, data from 104 patients were analyzed, the Se (n = 53) and control (n = 51) groups. There was no significant difference between the two groups regarding the baseline characteristics. In both groups CPB caused a markedly increase in CKMB and CTnI plasma concentrations compared to the baseline (P = 0.0001). Based on CKMB, there was no significant difference between the two groups at any point times, T0 (P = 0.357), T1 (P = 0.751), T2 (P = 0.46), T3 (P = 0.16) and T4 (P = 0.053). According to CTnI, there was just a significant difference between the two groups at T1 (P = 0.011) but not at T2 (P = 0.116), T3 (P = 0.09) and T4 (P = 0.634). No adverse effect was recorded linked to our intervention. Conclusions: Selenium can alleviate I/R injury in short time. Further well-planned trials are needed to find the optimized administration method to achieve the most beneficial effects to the patients.

Iranian Red Crescent Medical Journal, 2016

Iranian Red Crescent Medical Journal, 2018

Background: In patients undergoing Cardiopulmonary Bypass (CPB) with extracorporeal circulation, ... more Background: In patients undergoing Cardiopulmonary Bypass (CPB) with extracorporeal circulation, the rapid restoration of blood flow to the ischemic tissue induces cardiac damage termed as myocardial Ischemic Reperfusion (I/R) injury. Objectives: In the current study, the researchers hypothesized that Dexmedetomidine (DEX) modulates I/R injury in Coronary Artery Bypass Graft Surgery (CABG) with Cardiopulmonary Bypass (CPB). Methods: This randomized double-blind, clinical trial took place at Dr. Heshmat Hospital, an academic center affiliated to Guilan University of Medical Sciences (GUMS), Gilan, Iran. From April 2016 to March 2017, 114 eligible patients undergoing elective and isolated CABG were randomized to receive either DEX infusion 0.3 to 0.5 μg/kg/hour before induction of anesthesia till 12 hours postoperatively (group D) or normal saline as placebo (group C). The endpoints were used to assess creatinine phosphokinase-MB (CKMB) and cardiac troponin I (CTnI) levels at four measurement time points, including baseline (T0) and 6, 12, 24, and 48 hours after the operation (T0 T4). Results: Overall, 114 patients’ data were analyzed; group D (n = 58) and group C (n = 56). No significant differences were found between the two groups, in view of baseline characteristics. Following CPB, a marked increase in CKMB and CTnI plasma levels was observed in both groups compared with baseline (P = 0.0001). Serum CKMB levels increased from 2.27± 0.59 to 7.81± 1.39, and 2.22 ± 0.64 to 7.46 ± 1.25 and CTnI levels from 10.22 ± 0.17 to 4.89 ± 1.1, and 0.27 ± 0.28 to 4.5 ± 1.4 in groups C and D, respectively (P = 0.0001). According to CKMB, there was a significant difference between the two groups at T2 (P = 0.002) and T3 (P = 0.0001), and based on CTnI at T2 (P = 0.004) and T3 (P = 0.0001). However, no significant difference was observed at the other measurement point times. No adverse effect was recorded due to this intervention. Conclusions: Perioperative DEX in cardiac surgery appears safe, with properties to alleviate I/R injury. Obviously, future standard trials are required to find optimal intervention strategies.

Anesthesiology and Pain Medicine, Sep 21, 2014

Background: Simple and efficient way of pain management after Coronary Artery Bypass Graft (CABG)... more Background: Simple and efficient way of pain management after Coronary Artery Bypass Graft (CABG) surgery is an important aspect of patients' care. Objectives: This study aimed to compare the effects of morphine and diclofenac suppositories on postoperative pain management. Patients and Methods: In this double-blinded clinical trial study, 120 patients aged 30-65 years old, undergone CABG, were equally divided into two groups of A (morphine) and B (diclofenac). All patients were anesthetized with intravenous fentanyl 10 μg/kg, etomidate 0.2 mg/ kg and cisatracurium 0.2 mg/kg. Anesthesia was maintained with oxygen 50% and air 50%, propofol 50 μg/kg/min, fentanyl 1-2 μg/kg/h and atracurium 0.6 mg/kg/h. Analgesics were administered after the operation at intensive care unit (ICU) and Visual Analogue Score (VAS) was evaluated in both groups in 4-hour intervals after extubation for 24 hours. After extubation in case of VAS > 3, morphine suppository 10 mg (group A) or diclofenac suppository 50 mg (group B) was administered for patients. Results: No significant statistical relationship was found between the two groups regarding gender, age, BMI, paracetamol consumption, length of operation time, cardiopulmonary bypass pump (CPB) time, and stay time at ICU (P Value ≥ 0.05). Total dosage of used morphine was 22 ± 8.3 mg in each patient and total dosage of used diclofenac was 94 ± 32.01 mg. Average variation of VAS at measured intervals was significant (P Value ≤ 0.0001), but these variations were not significantly different when comparing the two groups (P Value = 0.023). Conclusions: Both morphine and diclofenac suppositories reduced pain significantly and similarly after CABG surgery.

ARYA Atherosclerosis, 2019

BACKGROUND Coronary artery bypass grafting (CABG) surgery is widely accepted as a revascularizati... more BACKGROUND Coronary artery bypass grafting (CABG) surgery is widely accepted as a revascularization method for coronary artery disease (CAD). Despite survival benefit and improvement in quality of life, CABG may impose major morbidities and significant complications. Right ventricle (RV) dysfunction is an important complication that may affect patient's longevity and functional capacity. The aim of this study was to evaluate the relationship between RV dysfunction and some invisible parameters like inferior vena cava (IVC) size with physical capacity. METHODS In this prospective study, 61 eligible CABG candidates were enrolled and RV function was assessed by echocardiographic parameters before CABG and one week and six months after the procedure, using tricuspid annular plane systolic excursion (TAPSE), Tei Index (TI), peak systolic movement (Sm) (cm/s), and IVC size. Functional capacity was assessed by six-minute walk test (6-MWT) 6 months after CABG. RESULTS 58 patients who di...

Anesthesiology and Pain Medicine, 2017

Background: Postoperative pain is a complex process commonly caused by surgical trauma. It is one... more Background: Postoperative pain is a complex process commonly caused by surgical trauma. It is one of the major concerns of patients undergoing heart surgery. Despite new techniques and modern analgesic treatments, postoperative pain is still one of the most important controversial issues. Methods: 68 patients scheduled for elective CABG with CPB were included in a prospective, double-blind clinical trial. They were randomly divided into two groups. One group received PCA pump including morphine (group P) with underlying infusion of 0.02 mg/kg/Qh, bolus dose of 1 mg, lockout time of 15 minutes, and a maximum of 4 bolus of 0.02 mg/kg for one hour and the other group received morphine bolus (group B). Three patients were excluded from the study, and 33 and 32 patients participated in the groups P and B, respectively. Variables including age, gender, pump time, aortic clamp time, duration of surgery, complications (nausea and vomiting, GI Bleeding, and hypoxia), level of pain based on VAS, opioid consumption, hemodynamic, and sedation status were measured in both groups. Results: There was no significant difference between the groups regarding age, gender, pump time, clamp time, duration of surgery, complication, sedation score, and hemodynamic status in most of the assessment periods. By assessing the pain severity in the groups at different periods, results showed a significant difference between the groups except at enrollment, and a lower severity of pain was noted in the group P compared to the group B. The consumed opioid was significantly higher in the group P than in the group B. However, higher doses of diclofenac and paracetamol were administered in the group B compared to the group P. Conclusions: Results showed that higher morphine would be used in patients with PCA pump after extubation following heart surgery, and this increased dose of opioid was associated with better pain control and lack of complication. Therefore, PCA pump with underlying infusion could be effectively used in patients undergoing CABG that are directly assessed in intensive care unite.

Anesthesiology and Pain Medicine, 2016

Background: Major surgeries such as open-heart surgery with cardiopulmonary bypass are associated... more Background: Major surgeries such as open-heart surgery with cardiopulmonary bypass are associated with a complexity of stress response leading to post-operative complications. Studies have confirmed that anesthesia can mitigate the surgically induced stress response. Objectives: The aim of this study was to compare the effects of propofol and isoflurane, both supplemented with Sufentanil, on the stress response in coronary artery bypass graft surgery with cardiopulmonary bypass, using cortisol as a biochemical marker. Methods: This double-blind randomized clinical trial was conducted on 72 patients who underwent coronary artery bypass grafting (CABG) with cardiopulmonary bypass meeting the inclusion criteria. The subjects were randomly divided into two groups of isoflurane (n = 36) and propofol (n = 36) both supplemented with sufentanil. Serum cortisol levels were measured and compared between the groups; 30 minutes before the surgery (T0), at the end of the cardiopulmonary bypass (T1), and 24 hours after the surgery (T2). Results: Compared to the baseline (T0), at the end of cardiopulmonary bypass (T1), both groups demonstrated a decrease in plasma cortisol levels with no statistical significant difference (P = 0.4). At T2 measuring time point, the level of plasma cortisol significantly increased in both groups (P = 0.02), however this increase was less in the Isoflurane group. Conclusions: In CABG with cardiopulmonary bypass, using plasma cortisol level as a measure, Isoflurane-Sufentanil significantly reduces the stress response to the surgery, when compared to propofol-Sufentanil.

Iranian Red Crescent Medical Journal, 2016

Background: In patients with coronary artery stenosis, coronary artery bypass graft surgery (CABG... more Background: In patients with coronary artery stenosis, coronary artery bypass graft surgery (CABG) is the most effective strategy to limit infarct size and improving outcomes. However, the rapid restoring of blood flow to the tissue can paradoxically induce cardiac damage. This phenomenon termed as myocardial ischemic/reperfusion (I/R) injury which is exacerbated under cardiopulmonary bypass (CPB) and is the cause of poor clinical outcomes. Therefore, it is essential to search for novel strategies with further cardio protective effects. Objectives: In the current study, we investigated the effects of selenium (Se) administration on I/R injury in CABG patients. Methods: This randomized double-blind clinical trial was conducted in the department of cardiac surgery of a university hospital in North of Iran from May 2015 to September 2015. One hundred and ten patients undergoing an elective isolated CABG surgery were divided into two groups using randomized fixed quadripartite blocks. They received either intravenous Se before induction of anesthesia, or normal saline as placebo. Cardiac troponin I (CTnI) and creatine kinase-MB (CKMB) were measured as biomarkers at four measurement point times, before the intervention (T0), at 6, 12, 24 and 48 hours after the surgery (T1-T4). Results: Finally, data from 104 patients were analyzed, the Se (n = 53) and control (n = 51) groups. There was no significant difference between the two groups regarding the baseline characteristics. In both groups CPB caused a markedly increase in CKMB and CTnI plasma concentrations compared to the baseline (P = 0.0001). Based on CKMB, there was no significant difference between the two groups at any point times, T0 (P = 0.357), T1 (P = 0.751), T2 (P = 0.46), T3 (P = 0.16) and T4 (P = 0.053). According to CTnI, there was just a significant difference between the two groups at T1 (P = 0.011) but not at T2 (P = 0.116), T3 (P = 0.09) and T4 (P = 0.634). No adverse effect was recorded linked to our intervention. Conclusions: Selenium can alleviate I/R injury in short time. Further well-planned trials are needed to find the optimized administration method to achieve the most beneficial effects to the patients.

Iranian Red Crescent Medical Journal, 2016

Iranian Red Crescent Medical Journal, 2018

Background: In patients undergoing Cardiopulmonary Bypass (CPB) with extracorporeal circulation, ... more Background: In patients undergoing Cardiopulmonary Bypass (CPB) with extracorporeal circulation, the rapid restoration of blood flow to the ischemic tissue induces cardiac damage termed as myocardial Ischemic Reperfusion (I/R) injury. Objectives: In the current study, the researchers hypothesized that Dexmedetomidine (DEX) modulates I/R injury in Coronary Artery Bypass Graft Surgery (CABG) with Cardiopulmonary Bypass (CPB). Methods: This randomized double-blind, clinical trial took place at Dr. Heshmat Hospital, an academic center affiliated to Guilan University of Medical Sciences (GUMS), Gilan, Iran. From April 2016 to March 2017, 114 eligible patients undergoing elective and isolated CABG were randomized to receive either DEX infusion 0.3 to 0.5 μg/kg/hour before induction of anesthesia till 12 hours postoperatively (group D) or normal saline as placebo (group C). The endpoints were used to assess creatinine phosphokinase-MB (CKMB) and cardiac troponin I (CTnI) levels at four measurement time points, including baseline (T0) and 6, 12, 24, and 48 hours after the operation (T0 T4). Results: Overall, 114 patients’ data were analyzed; group D (n = 58) and group C (n = 56). No significant differences were found between the two groups, in view of baseline characteristics. Following CPB, a marked increase in CKMB and CTnI plasma levels was observed in both groups compared with baseline (P = 0.0001). Serum CKMB levels increased from 2.27± 0.59 to 7.81± 1.39, and 2.22 ± 0.64 to 7.46 ± 1.25 and CTnI levels from 10.22 ± 0.17 to 4.89 ± 1.1, and 0.27 ± 0.28 to 4.5 ± 1.4 in groups C and D, respectively (P = 0.0001). According to CKMB, there was a significant difference between the two groups at T2 (P = 0.002) and T3 (P = 0.0001), and based on CTnI at T2 (P = 0.004) and T3 (P = 0.0001). However, no significant difference was observed at the other measurement point times. No adverse effect was recorded due to this intervention. Conclusions: Perioperative DEX in cardiac surgery appears safe, with properties to alleviate I/R injury. Obviously, future standard trials are required to find optimal intervention strategies.

Anesthesiology and Pain Medicine, Sep 21, 2014

Background: Simple and efficient way of pain management after Coronary Artery Bypass Graft (CABG)... more Background: Simple and efficient way of pain management after Coronary Artery Bypass Graft (CABG) surgery is an important aspect of patients' care. Objectives: This study aimed to compare the effects of morphine and diclofenac suppositories on postoperative pain management. Patients and Methods: In this double-blinded clinical trial study, 120 patients aged 30-65 years old, undergone CABG, were equally divided into two groups of A (morphine) and B (diclofenac). All patients were anesthetized with intravenous fentanyl 10 μg/kg, etomidate 0.2 mg/ kg and cisatracurium 0.2 mg/kg. Anesthesia was maintained with oxygen 50% and air 50%, propofol 50 μg/kg/min, fentanyl 1-2 μg/kg/h and atracurium 0.6 mg/kg/h. Analgesics were administered after the operation at intensive care unit (ICU) and Visual Analogue Score (VAS) was evaluated in both groups in 4-hour intervals after extubation for 24 hours. After extubation in case of VAS > 3, morphine suppository 10 mg (group A) or diclofenac suppository 50 mg (group B) was administered for patients. Results: No significant statistical relationship was found between the two groups regarding gender, age, BMI, paracetamol consumption, length of operation time, cardiopulmonary bypass pump (CPB) time, and stay time at ICU (P Value ≥ 0.05). Total dosage of used morphine was 22 ± 8.3 mg in each patient and total dosage of used diclofenac was 94 ± 32.01 mg. Average variation of VAS at measured intervals was significant (P Value ≤ 0.0001), but these variations were not significantly different when comparing the two groups (P Value = 0.023). Conclusions: Both morphine and diclofenac suppositories reduced pain significantly and similarly after CABG surgery.